Bluebird vs TinyPNG: private image compression without the 20-file limit
TinyPNG's compression quality is genuinely great, but it uploads every image to their servers, caps free users at 20 images and 5MB each per batch, and requires a paid TinyPNG API for anything at scale. Bluebird's image compressor runs entirely in-browser using MozJPEG and WebP encoders — no uploads, no batch limit, no per-file size cap beyond your device's memory.
Feature-by-feature comparison
| Feature | Bluebird | TinyPNG |
|---|---|---|
| Files uploaded to a server | Never | Yes, every image |
| Batch limit (free) | Unlimited | 20 images per batch |
| Per-file size cap (free) | Device RAM only | 5 MB per file |
| API access | N/A — runs in your browser | Paid TinyPNG Developer API |
| Formats supported | JPG, PNG, WebP, AVIF, HEIC | JPG, PNG, WebP |
| Sign-up required | No | Yes for API and dashboards |
| Price | Free forever | Free tier + paid API |
| Works offline | Yes | No |
The honest verdict
TinyPNG's algorithm is arguably the industry gold-standard for lossy PNG. If you need that specific proprietary compressor, use them. If you need to compress hundreds of images privately without hitting a batch limit — or if you also want AVIF/HEIC support — Bluebird is the faster path.
Tools people compare most
Frequently asked
Is Bluebird's compression as good as TinyPNG's?+
For JPG it's essentially identical — we use MozJPEG, the same encoder most modern tools use. For PNG, TinyPNG's proprietary lossy PNG algorithm still wins on some images.
Can I compress 500 images at once?+
Yes. The batch tool processes them in the background and downloads a zip. Your browser is the only bottleneck.
Do you strip EXIF and location data?+
Yes — compression rewrites the file and removes metadata by default. Use our EXIF Viewer if you want to see what would have leaked.