TinyPNG is excellent at what it does — but it uploads your files, caps free sessions at 20 images, and only handles PNG, JPEG, and WebP. Here's what to use instead.
Convertlo's image compressor runs entirely in your browser using browser-image-compression and Pica — no upload, no 20-image cap, no 5 MB file size limit. Compresses JPEG, PNG, WebP, and GIF. Drag and drop multiple files. Also converts between formats if you need to switch from PNG to WebP at the same time.
Made by the Google Chrome Labs team. Browser-based image compression with real-time before/after preview and precise quality/effort sliders. Supports JPEG, PNG, WebP, AVIF, JXL, BMP. Great if you want to see exactly what you're getting before downloading. Single file at a time.
Cloud-based image compressor supporting PNG, JPEG, GIF, SVG, and WebP. Offers both lossy and lossless compression modes. Free: 10 images per day (no account). Files are uploaded to their servers. Good for when you need lossless compression as a controlled option.
Browser-based SVG optimizer built on SVGO. Zero upload, unlimited. Optimizes SVG markup (removes metadata, comments, unused elements). Not for raster images — JPEG/PNG only through a different tool. The go-to for web developers optimizing SVG icon files.
Free macOS desktop app that compresses PNG, JPEG, and GIF locally — nothing uploaded. Uses multiple optimizers (PNGOUT, Zopfli, MozJPEG) for best results. Batch processing. No web version. Windows users need a different tool.
Cloud-based image optimization with a robust API. Free tier: 100 MB lifetime. Files uploaded to servers. Good for developers who need to integrate image compression into a workflow or pipeline. Not a great free option for regular manual use.
| Feature | TinyPNG | Convertlo | Squoosh | Compressor.io |
|---|---|---|---|---|
| Files uploaded | Yes | Never | Never | Yes |
| Free limit | 20/session | Unlimited | Unlimited | 10/day |
| File size limit | 5 MB | 50 MB | Unlimited* | 10 MB free |
| Formats | PNG, JPEG, WebP | JPEG, PNG, WebP, GIF | JPEG, PNG, WebP, AVIF, JXL | PNG, JPEG, GIF, SVG, WebP |
| Batch files | Yes | Yes | No | Yes (paid) |
| Format conversion | No | Yes | Yes | No |
| Account required | No (basic) | Never | Never | No (basic) |
*Squoosh file size limited by available browser memory.
For unlimited compression without uploads, Convertlo and Squoosh are the top picks. Convertlo compresses JPEG, PNG, WebP, and GIF entirely in the browser — no upload, no daily limit, no account. Squoosh gives more advanced quality sliders if you want fine-grained control.
Yes. TinyPNG uploads your images to their servers for processing with their proprietary compression algorithm. Convertlo and Squoosh compress images locally in the browser — no files leave your device at any point.
TinyPNG allows 20 images per session without an account, and 100 compressions per month with a free account. Unlimited usage requires a paid API key. Convertlo and Squoosh have no such limit — both are fully free and unlimited.
Yes. Convertlo's image compressor and Squoosh both offer unlimited free compression with no account required and no daily cap, because they run entirely in your browser. There's nothing to count since nothing goes to a server.
Yes, TinyPNG added WebP support. It handles PNG, JPEG, and WebP. Convertlo also supports WebP compression and can convert between WebP, JPEG, PNG, AVIF, and other formats. Squoosh supports WebP, JPEG, PNG, AVIF, and JXL.
Drag, drop, compress. JPEG, PNG, WebP, GIF. No account, no cap, no cloud.
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