Every Bluebird tool in one place

A 12 MB photo down to 300 KB — no fuzzy faces, no upload, no account. Drag a JPG, PNG or WebP and slide the live before/after to find the sweet spot.

Change the width and height of a photo, or pick a ready-made size for Instagram, YouTube and more.

Crop a photo to a square, a fixed ratio, or any custom box — with a live drag-to-resize handle.

Rotate a photo by 90°, straighten it with a slider, or mirror it horizontally or vertically.

Turn a JPG into a PNG, a PNG into a WEBP, or any other mix — in a single click.

Add a text or logo watermark to one photo — or to a whole batch at once.

See hidden info inside a photo (camera, location, date) and remove it before sharing.

Turn any image into a full set of website icons, zipped and ready to drop into your site.

Convert iPhone HEIC photos to JPG or PNG in your browser. Batch-convert dozens and download them as a ZIP.

Add classic and modern looks to a photo — mono, vintage, warm, punch and more — with live preview.

Turn an image into a Base64 data URL ready for HTML, CSS or JSON. Copy in one click.

Turn any SVG into a crisp PNG at any size, with full transparency support.

Turn any photo into ASCII art — adjust width, contrast and character set. Copy text or save as PNG.

Scan a QR code from an image, screenshot or your camera — decoded text and links shown instantly.

Shrink dozens of JPG, PNG or WEBP photos at once — runs in parallel Web Workers, no upload on server.

Convert many images between JPG, PNG, WEBP and AVIF in one go — in your browser.

Generate custom placeholder images for mockups and websites. Any size up to 4000×4000, custom colors, export PNG/JPG/SVG.

Erase photo backgrounds locally with on-device AI. Transparent PNG download — no upload on server, no watermark.

Enlarge images 2×–4× with high-quality Lanczos resampling and adjustable sharpening — runs entirely in your browser.

Design 1200×630 Open Graph / Twitter cards with titles, gradients and logos. Export PNG ready for og:image.

Compare two images pixel by pixel with a red diff overlay and change percentage. Great for QA, design review and before/after checks.

Upload any photo, add classic top and bottom text, and download the meme — no watermark, no upload on server.

Combine up to 12 photos with curated layouts, per-slot zoom & pan and story or post crops — export a clean PNG or JPG.

Drop up to 200 photos and get an auto grid or justified mosaic collage in seconds — smart sorting, adjustable columns, no upload on server.

Turn any photo into pixel-art or a privacy mosaic with adjustable block size — all in your browser.

Turn any photo into a two-color duotone with presets like Spotify, Sunset and Cyanotype — or pick your own shadow and highlight. Live preview, PNG or JPG export.

Convert JPG photos to WebP for smaller files at the same quality. Batch + ZIP, no upload.

Turn WebP images into universal JPGs. Batch + quality slider, all in your browser.

Convert WebP to lossless PNG with transparency preserved. Batch + ZIP export.

Shrink PNG graphics into WebP for faster pages. Batch + quality control, private in-browser.

Convert PNG to next-gen AVIF for the smallest possible files. Runs in your browser.

Turn modern AVIF images into universally supported PNGs. Batch + ZIP export.

Convert AVIF to JPG for maximum compatibility. Quality slider, batch mode, no upload.

Re-encode JPG photos as AVIF to cut file size dramatically. Free, in your browser.

Turn old BMP bitmaps into small PNGs. Batch supported, nothing uploads.

Convert Windows BMP bitmaps to JPG with a quality slider. Batch + ZIP.

Combine two or more photos into one image — side-by-side, stacked or grid, with adjustable spacing and border color. Two clicks, no upload.

Combine many photos into a single PDF — perfect for receipts, IDs, homework or portfolios.

Turn every page of a PDF into a sharp PNG or JPG — pick the pages you want and download them in one go.

Shrink PDF files in your browser. High-quality, balanced or smallest — your file stays private and never uploads.

Drag five bills into one PDF. Reorder them. Download. Your files never touch a server.

Split a PDF into single pages or pull out a custom range like 1-3,7. Free and fully private.

Turn plain text into a clean, paginated PDF. Pick page size, font size and margins — all in your browser.

Add page numbers to any PDF. Pick a position, format and starting number — your file never leaves your device.

Turn Markdown into a clean, paginated PDF. Headings, lists, code and quotes all rendered properly.

Rotate every page or just a custom range of a PDF by 90°, 180° or 270°. Saved fresh, no upload on server.

Pull copyable text out of any PDF. Pick all pages or a range, then copy or save as a .txt file.

Remove unwanted pages from a PDF and save a clean new file. Pick page numbers or ranges.

Save just the PDF pages you need into a fresh, smaller PDF. Pick any range like 1-3,7.

Inspect any PDF: fonts, images, hidden text under redactions, metadata leaks, embedded scripts and a per-page density heatmap.

Unlock password-protected PDFs you own. Files never leave your device — the password is used locally only.

Add text or image watermarks to every page of a PDF. Control opacity, rotation, size and position — done locally.

Draw a signature and place it anywhere on a PDF. Your document never leaves your browser.

Stamp sequential Bates numbers across one or more PDFs for legal discovery — prefix, suffix, start number, position and font size. 100% in your browser.

Reorder, rotate, and delete pages in a PDF with live thumbnails. Nothing is uploaded — everything happens on your device.

Extract text from scanned PDFs in 100+ languages with Tesseract — the OCR engine runs right in your browser, no upload on server.

Turn HTML or a live webpage snippet into a crisp, paginated PDF — with page size and margins. Fully local rendering.

Trim white margins from every page or apply a custom crop box — visual preview and precise numeric control.

Convert a PDF to an editable .docx file locally. Paragraphs and page breaks are preserved — nothing is uploaded.

Turn tables inside a PDF into a real .xlsx workbook with one sheet per page. Fully client-side extraction.

Add text, images and rectangles anywhere on a PDF page — click to place, drag to move, save without any watermark or upload.

Combine 2, 4, 6 or 9 PDF pages onto one sheet for compact printing — with margin and gap controls. Runs locally.

Convert a color PDF to clean grayscale — great for printing and saving ink. Adjustable DPI and quality, fully client-side.

Set or strip PDF title, author, subject, keywords and dates. Perfect for privacy before sharing — nothing leaves your device.

Spot every change between two PDFs with a red diff overlay on each page. Great for contracts and drafts — 100% local.

Impose your PDF as a fold-and-staple booklet — saddle-stitch order, choose sheet size, margin and gutter. Runs in your browser.

Bake form fields and annotations into the page so they can't be edited. Safe or full-raster mode — no upload on server, no watermark.

Add custom header and footer text with page number, date and filename placeholders. Fully client-side — no watermark, no upload on server.

Pull every embedded picture out of a PDF as a PNG file, packaged in a ZIP. Runs entirely in your browser.

Rescale every PDF page to A4, Letter, Legal, A3, A5 or Tabloid. Fit, fill or stretch — fully client-side, no watermark.

Add pages from a second PDF into any position of your document — pick a range, insert before or after. Runs locally.

Type into every field of a fillable PDF — text, checkboxes, dropdowns and radios. Optional flatten to lock the answers.

Flip the order of pages in a PDF — reverse the whole document or just a range. 100% client-side.

Insert blank pages into a PDF at any position — great for notes, dividers or double-sided printing.

Use your phone or webcam to scan documents into a multi-page PDF. High-contrast mode for crisp text. Nothing is uploaded.

Paste anything — a webhook payload, a config, a copied fetch response. We'll indent it, sort the keys, and tell you exactly where the missing comma is.

Turn text or files into Base64 and back. URL-safe option and a one-click file-to-data-URL helper.

Paste a token to see header, payload and signature. The token never leaves your browser, so it's safe for prod secrets.

Write patterns and see matches highlight live. Tune flags, inspect capture groups, and throw ugly patterns at it safely — ReDoS-guarded.

Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes from text or any file — and verify a download with one paste.

Turn Unix epoch timestamps into human dates and back. Seconds or milliseconds, your timezone or UTC.

Turn CSV into JSON or JSON into CSV. Auto-detect delimiter, preview the result and download the file.

Explain any 5-field cron expression in plain English and preview the next upcoming runs.

Check one email or a whole list for valid syntax, with helpful typo suggestions for popular domains.

Generate SEO, Open Graph and Twitter Card meta tags with live Google and social previews.

Build a clean robots.txt with custom rules, sitemap URLs and tested presets for WordPress and more.

Visual file-permission builder — tick boxes to get octal, symbolic and a ready-to-paste chmod command.

Beautify SQL queries for PostgreSQL, MySQL, SQLite, T-SQL and more. Pick indent and keyword case.

Convert text to binary and back — full UTF-8 support including emoji, with optional byte spacing.

Calculate IPv4 subnet, mask, broadcast, host range and class from any IP and CIDR prefix.

Paste any User-Agent to see the browser, version, engine, OS and device — perfect for bug reports.

URL, HTML entities and hex encode/decode in one tool — bulk friendly and offline.

Drag two handles to design CSS easing curves with a live animation preview — copy ready-to-paste cubic-bezier().

Visual flex container playground — tweak direction, alignment, gap and per-item flex, then copy production-ready CSS.

Design a schema and generate up to 1,000 realistic mock records — names, emails, dates, UUIDs and more.

Live GitHub-flavored Markdown editor with split preview, themes, table of contents, autosave and HTML export.

Two-way HTML ↔ JSX with class→className, inline style objects, self-closing tags and SVG attribute fixes.

Shrink SVG files up to 80% smaller — strip editor junk, comments and unused IDs while keeping the visual identical.

Minify JavaScript with Terser or pretty-print it for readability. Mangle names, drop comments and see how much smaller it gets.

Compress CSS to the smallest valid form or beautify with one declaration per line and clean indentation.

Encode text to HTML entities — named, decimal or hex — or decode entities back into normal text and emoji.

Paste any JSON and get clean TypeScript interfaces — optional readonly, optional fields and array merging.

Convert a cURL command into fetch, axios, Python requests, PHP, Go or Node — runs entirely in your browser.

Generate 2FA / TOTP codes from a secret. Live 30-second countdown and otpauth:// QR code — keys stay on your device.

Turn code into beautiful screenshots with syntax highlighting, window chrome and gradient backgrounds. Export PNG.

Generate a strict Zod v3 schema from any JSON sample — optionals, enums for repeated strings and clean reusable definitions.

Inspect a .har file — requests, status, sizes, slowest hits and MIME breakdown — without uploading. HAR files contain cookies and auth headers, so privacy matters.

Find exact years, months and days between any two dates — plus your next birthday.

Calculate body mass index in metric or imperial, with category and a healthy weight range.

Work out X% of a number, what percent one number is of another, and percent increase or decrease.

Estimate your monthly loan payment, total interest and full amortisation for any loan amount, rate and term.

Add a tip to any bill and split it evenly between any number of people in seconds.

See the final sale price and how much you save from a percentage discount, plus stacked discounts.

Find the exact days, weeks, months and years between two dates — or add days to jump in time.

See how your savings grow with compound interest and monthly contributions — full year-by-year breakdown.

Estimate your monthly mortgage payment, total interest and payoff date — with property tax, insurance and extra payments.

Find missing width or height for any aspect ratio. Presets for 16:9, 9:16, 1:1, 4:5 and cinema.

Calculate your GPA on a 4.0 scale. Add courses with credits and letter grades — see your average instantly.

Add, subtract, multiply or bitwise-combine binary, decimal or hex numbers. See results in all three bases.

Decode 4, 5 and 6-band resistor colour codes to resistance, tolerance and temperature coefficient.

Add, subtract, multiply or divide fractions and mixed numbers. Simplified, mixed and decimal results in one view.

Trig, logs, powers, roots, factorial and parentheses — with history and full keyboard support.

Solve A:B = C:D for a missing value, simplify ratios to lowest terms, and scale them up or down.

Solve any triangle from sides or angles — get area, perimeter and the missing side or angle.

Find your daily protein target from weight, activity level and goal. Grams per day and per meal.

Enter any two of voltage, current, resistance or power — get the other two using V=IR and P=VI.

Add up cash, gold, silver and business assets, subtract debts, and get 2.5% zakat instantly.

Find the midpoint between two coordinates, plus distance and slope — with worked-out steps.

Find the best bedtime or wake-up time using 90-minute sleep cycles.

Add weekly clock-in/out times, subtract breaks and get total hours, overtime and pay.

Add or subtract days, weeks, months or years from any date — with business-days mode.

Calculate running pace, time and speed — with 5K, 10K, half and full marathon splits.

Estimate calories burned by activity using standard MET values — walking, running, cycling and more.

Get personalised daily protein, carbs and fat for your goal using Mifflin-St Jeor BMR.

Estimate body fat percentage with the US Navy tape-measure formula — no calipers needed.

Healthy weight ranges from BMI plus four classic formulas (Devine, Robinson, Miller, Hamwi).

Find your estimated due date and current week of pregnancy from LMP or conception date.

Find your fertile window, likely ovulation day and the next three periods.

Find the best bedtime or wake-up time using 90-minute sleep cycles — wake at the end of a cycle, not the middle.

Calculate pace, time or distance. Presets for 5K, 10K, half and full marathon, with a km/mile splits table.

Convert numbers between binary, octal, decimal and hexadecimal. Big-number safe, with one-click copy.

Convert length, weight, volume, area, speed, time and data between dozens of common units.

Switch any temperature between Celsius, Fahrenheit and Kelvin — accurate to the decimal.

Roman numerals, binary, Morse, pig latin, wingdings, fancy text and NATO phonetic — seven converters in one.

Drag in files or a whole folder, pick a compression level and build a .zip — all in your browser.

Open any .zip in your browser to preview text and images, download single files or extract everything.

Open RAR, 7z, TAR and TGZ archives locally — preview, unlock with a password and extract as a ZIP.

Two-way XML and JSON conversion with attribute handling, pretty-printing and live validation.

Two-way YAML and JSON conversion with live validation, file upload and one-click copy.

Convert TOML config to JSON and back with live validation — perfect for Cargo, pyproject and Hugo files.

Two-way Markdown and HTML conversion with live preview, GitHub-flavored syntax and one-click copy.

Convert CSV to Excel (XLSX) and back. Handles multi-sheet workbooks, large files and UTF-8 — all in your browser.

Rasterize SVG to PNG or JPG at 1×–8× scale with transparent background and batch ZIP export.

Convert PNG, JPG and GIF to WebP and back — quality control, batch ZIP and real-time size savings.

Convert Word documents to PDF locally. Keeps headings, lists and basic formatting — no upload on server, no account.

Convert between SRT and VTT, shift every timestamp by ± seconds, and clean up formatting — runs locally, no upload on server.

Build a .vcf contact card with QR code for one-tap saving on any phone, or drop an existing vCard to edit it. Runs only in your browser.

Create a calendar .ics file with one or many events, reminders and repeat rules — importable by Google, Apple and Outlook.

Write any number as words for cheques, contracts and forms. International (million/billion) and Indian (lakh/crore) formats with currency and ordinals.

Switch text between UPPER, lower, Title, camel, snake, kebab and more — with live word and character counts.

Compare two blocks of text or code and see every change highlighted line-by-line or word-by-word.

Count words, characters, sentences and reading time as you type. Perfect for essays, blogs and tweets.

Generate paragraphs, sentences or words of placeholder text. Copy as plain text or wrap as <p> HTML.

Turn any title into a clean URL slug. Accent-safe, custom separator, batch-friendly — copy and paste in seconds.

Pull every email, URL, phone number, hashtag or number out of any block of text in one tap.

Search and copy emojis in one click — faces, hands, hearts, animals, food, flags and more.

Count syllables, words and lines. Great for haiku, lyrics and readability checks — right in your browser.

Convert text to Morse and back — with audio playback at 18 WPM. Free, offline and privacy-friendly.

Paste any text to see how long it takes to read — slow, average and read-aloud speeds.

Score your writing with Flesch Reading Ease and Flesch-Kincaid grade level.

Sort a list of lines A-Z, Z-A, by length, numerically or shuffle them — with trim and dedupe options.

Strip duplicate lines from any list with optional case-insensitive matching and duplicate counts.

Convert HTML to clean plain text — keep line breaks and link URLs if you want.

Find and replace text across long blocks — with regex, case-insensitive and whole-word options.

Turn any phrase into a snappy acronym — first letter, two-letter, camel case and more.

Repeat, strip whitespace, reverse and add line numbers — bulk text utilities in one place.

Build Markdown tables in an editable grid with column alignment, CSV/TSV import and HTML or CSV export.

Split long posts into a numbered X / Twitter thread without breaking words. Custom limits and per-post counter.

Add bold, italic and bold-italic to LinkedIn posts using Unicode — works where LinkedIn has no native formatting.

Cut MP3, WAV, M4A or OGG files to the exact start and end you want — saves as MP3 or WAV.

Join several audio clips into one continuous track, in the order you choose.

Convert between MP3, WAV, M4A and OGG with a choice of MP3 quality from 96 to 320 kbps.

Speed up or slow down any audio from 0.25× to 4× — perfect for lessons, podcasts and effects.

Shift pitch up or down by semitones without changing the length — great for music practice and karaoke.

Play any clip backwards for fun effects, sound design or hidden‑message experiments.

Even out quiet audio by raising the loudest peak to a safe target level — without distortion.

Smoothly blend the end of one clip into the start of another — a classic DJ transition.

Automatically find and remove long quiet stretches from podcasts, interviews and voice memos.

Play sine, square, triangle or saw waves from 20 Hz to 20 kHz — tune instruments and test speakers.

A precise 30–300 BPM metronome with time signatures, accented beats and tempo presets.

Drop in a song and estimate its tempo in beats per minute — useful for DJs, dancers and producers.

Live waveform and frequency display from any file or your microphone — nothing is recorded.

Trim any song to 30 seconds, add fade in and fade out, and save as iPhone .m4r or Android .mp3.

Tap any pixel in a photo to read its HEX, RGB and HSL color, and build a small palette.

Convert any color between HEX, RGB, HSL, HSV and OKLCH. Live swatch and one-click copy for every format.

Generate harmonious color palettes — complementary, analogous, triadic and more. Copy HEX, RGB or CSS variables instantly.

Design linear, radial and conic CSS gradients with a live preview. Copy the CSS in one click.

Design CSS shadows visually with stacked layers, live preview and one-click copy.

Check WCAG AA and AAA color contrast between text and background, with a live preview.

Design rounded corners visually with per-corner control, live preview and a one-click CSS copy.

See your designs through protanopia, deuteranopia, tritanopia and more — check accessibility for everyone.

Design clip-path shapes — triangle, hexagon, star, arrow and more — with a live preview and one-click CSS.

Design frosted-glass cards with a live preview — blur, tint, border and shadow. Copy CSS or Tailwind in one tap.

Visual CSS Grid builder — pick columns, rows, gaps and tracks (fr, px, auto) with a live cell preview.

Generate smooth SVG waves for landing pages — control height, amplitude and gradient, then copy SVG or download.

Generate a full 50–950 Tailwind color scale from any base color. Copy the config snippet straight into your project.

Design bold mesh gradients with draggable color points. Copy CSS, or export a PNG or SVG at 4K, social or wallpaper sizes.

Design soft-UI (neumorphism) buttons and cards with a live preview and copy-ready CSS. Flat, pressed, concave or convex.

Listen to any text in dozens of natural voices — adjust speed and pitch and download to use anywhere.

Record your screen, a window or a browser tab with optional microphone. Saves locally — no signup, no watermark.

Voice typing in your browser — supports 15+ languages, live transcript, edit and download as text.

Take webcam snapshots with timer, mirror and camera switch. Photos stay on your device.

Record voice memos with live level meter, pause and resume. Saves locally as audio files.

Trim videos by setting in / out points. Re-encodes locally via MediaRecorder — no upload on server, no watermark, no install.

Convert any short video clip to an animated GIF. Pick frame rate, size and quality — fully offline.

Shrink videos with a target bitrate. Outputs WebM in-browser using MediaRecorder — no server, no waiting in a queue.

Scrub to any moment in a video and save that frame as a JPG or PNG — offline, no upload on server.

Pull frames from a video at a set interval and download them as a ZIP of JPG or PNG images.

Read a video's duration, resolution, aspect ratio and estimated frame rate — all in your browser.

Make a styled QR code for a link, Wi-Fi network, contact card or plain text — with your own colors and logo.

Create strong, unique passwords with a live strength meter. Built with secure browser randomness — never sent anywhere.

Generate up to 1,000 secure v4 or time-sortable v7 UUIDs. Bulk copy, download or tweak the format.

Generate secure random numbers — single value, a list, unique draws, integers or decimals. Built on browser cryptography.

Shuffle a list or randomly pick one or many items — perfect for giveaways and fair draws.

Get 20 fresh, unique usernames for gaming, Instagram and TikTok. Pick a style — modern, aesthetic, gamer or minimal.

Generate random names, emails, phone numbers and addresses for testing and design mockups. Export as CSV.

Generate Code128, EAN-13, UPC, Code39 and more — live preview, custom colours, PNG or SVG download.

Draw with mouse or finger, or type your name in a signature font. Download a transparent PNG or SVG to drop into contracts, PDFs and emails.

Password-protect any message with AES-256-GCM. Share the encrypted note — only someone with the password can read it. Runs entirely in your browser.

See how strong a password really is — entropy, offline crack time and clear tips to make it stronger. Never leaves your device.

Split a photo into a perfectly aligned 3×3, 3×2 or 3×1 Instagram grid — download every tile in posting order.

Turn one wide photo into 2 to 10 seamless square or 4:5 carousel slides — ZIP download, in posting order.

Fit any photo to Instagram post, portrait, story or reel sizes — pad with a smart color, no awkward crop.

Pick a topic and get a balanced mix of popular, medium and niche hashtags — copy 30 in one tap.

Build a stylish IG bio with fancy fonts, symbols and clean line breaks — preview and copy ready to paste.

Work out your Instagram, TikTok or YouTube engagement rate from followers, likes, comments and saves.

Add real paragraph spacing to Instagram captions. Invisible characters keep your blank lines after posting.

Design clean Instagram Highlight covers in any color with a built-in icon library — 1080×1920 PNG, no watermark.

Design a Reels cover that doesn't get cut on the profile grid — live safe-zone guides and bold title text.

Type a name and get 60+ aesthetic, niche and creative Instagram username ideas — tap to copy.

Grab any YouTube video thumbnail in HD, SD or default size from a link or video ID.

Paste any YouTube link — watch, share, Shorts or embed — and get the 11-character video ID plus clean URLs.

Estimate YouTube AdSense earnings from views — by niche, CPM range and monetisable rate.

Build YouTube chapters that actually unlock — 0:00 start, in order, 10s+ apart, ready to paste.

Resize any photo to a 2560×1440 YouTube channel banner with the TV-safe zone marked — so titles never get cropped.

Subscribe links, embed codes, timestamp links and title length counter — one tool for every YouTube creator.

Design a 1080×1920 Shorts thumbnail with bold text presets and the YouTube UI safe zone shown live — nothing hidden by Subscribe or comment buttons.

Preview up to 3 thumbnails side-by-side at the real sizes viewers see — mobile feed, desktop sidebar, search and channel grid. Pick the winner before you publish.

Convert subtitles between SRT and WebVTT — auto-detects the input, preserves timing and line breaks. Drop a file or paste in cues. No upload on server.

Build a polished description with hook, chapters, links, hashtags and a call to action — live 5,000-character check and one-tap copy.

See the real watch time at 1.25×, 1.5×, 2× — the exact finish time, and how much of your day you save. Works for videos, podcasts and audiobooks.

Paste any YouTube URL and set the exact moment (h:mm:ss). Get a clean, share-ready link that jumps straight to that second. Live preview + one-tap copy.

Build a custom YouTube <iframe> — autoplay, mute, loop, start & end times, controls, privacy-enhanced mode. Live preview and copy-ready HTML.

Turn any channel handle or ID into a one-click subscribe link (?sub_confirmation=1). Live preview and a matching QR-friendly URL.

Estimate TikTok Creator Fund and brand-deal earnings from views, followers and engagement.

Calculate your TikTok engagement rate by views or followers — with the same formula brands use.

A precise stopwatch with lap times and a countdown timer with a soft alarm — perfect for work and study.

Stay focused with 25 minute work sprints and 5 minute breaks — gentle alarm and round tracking.

Dice, coin flip, tally, number picker and list shuffler — all in one tool with history and CSV export.

Track daily habits with a 30-day grid. Stored only in this browser — no account, no cloud, no nagging.

A private, browser-only Kanban with To-do / Doing / Done columns. Drag cards between columns — saved on your device.

Check if an IPv4 or IPv6 address is valid — with class, scope and binary breakdown.

Turn a CIDR block into network, broadcast, first/last host and total addresses.

Identify the manufacturer behind a MAC address from a bundled offline OUI list.

Format A, AAAA, CNAME, MX, TXT and SRV records into clean zone-file lines.

Build a valid SPF TXT record step by step with IPs, includes and a clear policy.

Generate a DMARC TXT record with policy, alignment and reporting addresses.

Generate a 1024 or 2048-bit DKIM RSA key pair entirely in your browser.

Search common TCP and UDP port numbers and the services that use them.

Plain-English reference for every HTTP status code — 200, 301, 404, 500 and more.

Break any URL into protocol, host, path, query parameters and hash.

Convert an IPv4 or IPv6 address into its reverse DNS (.arpa) zone name.

Remove EXIF, GPS and camera metadata from many photos at once — download as ZIP.

Drag boxes over faces or sensitive areas to blur them — no upload on server, no AI.

Black-out names and account numbers in a PDF and download a flattened redacted copy.

Clean emoji, accents and unsafe characters from file names for any operating system.

Make Gmail-compatible plus-addresses and dot variants to track signups privately.

Preview any text in dyslexia‑friendly fonts with adjustable spacing, line height and colour.

Bold the leading letters of each word so your eyes can scan faster — copy or download the result.

Preview the same paragraph at multiple font sizes side‑by‑side to pick the most readable one.

See how your image looks to people with protanopia, deuteranopia or tritanopia. Runs on canvas, offline.

Build a clean invoice with line items, tax and notes. Print or save as PDF in one click — no signup.

Design a print‑ready business card with bleed and crop marks. Exports a multi‑up PDF you can send straight to a printer.

All 118 elements with mass, symbol and category. Searchable and works fully offline.

Build a deck of cards, shuffle and study with flip and progress tracking. Saved in this browser only.

Generate printable multiplication tables in any range — perfect for kids and classrooms.

Solve linear, quadratic and symbolic equations or evaluate expressions instantly using mathjs — all offline.

Balance any chemical equation by solving the coefficient matrix. Supports parentheses, charges and common compounds.

Convert between Wei, Gwei and Ether with full BigInt precision — perfect for gas estimates.

Compute the 4‑byte function selector (keccak‑256) for any Solidity function signature.

Auto-detect and validate BTC, ETH, LTC, DOGE and SOL addresses — catch typos before you send.

Compare current time across multiple cities at a glance — perfect for remote teams and travel planning.

Calculate great‑circle distance between two coordinates in km and miles using the Haversine formula.

Split shared expenses fairly across your group — get a clean settle‑up list with who owes whom.

Measure how fast you react to a colour change. Five rounds, personal best and a share-ready score.

Turn any English text into pig Latin — and back again — with proper punctuation and capital handling.

Flip text ǝpᴉsdn uʍop for social bios and captions. Copy with one tap, works on every keyboard.

Turn text into ˢᵐᵃˡˡ Unicode letters — small caps, superscript and subscript for bios and captions.

Spin a colourful wheel to pick a random name from your list — great for classrooms and giveaways.

Generate fresh Sudoku puzzles at four difficulty levels. Play on screen or print to play later.

Turn an acronym or word list into memorable mnemonic phrases — great for study and revision.