Compress JPEG, PNG, and WebP images right in your browser — no upload, no 20-image limit, no account. Just a quality slider and a before/after preview.
TinyPNG is a genuinely great compressor, but every image you drop into it is uploaded to its servers and kept for up to 48 hours, and the free web tool stops at 20 images of 5 MB each. If you'd rather not send your photos to a server — or you keep bumping into those limits — Webhackz compresses each image entirely inside your browser tab. Nothing is uploaded, there's no batch or file-size cap beyond your device's memory, and it's free with no sign-up.
| Feature | Webhackz | TinyPNG |
|---|---|---|
| Where your images go | Stay in your browser — never uploaded | Uploaded to TinyPNG's servers (kept up to 48h) |
| Free-tier limit | Unlimited (bounded only by your device's memory) | 20 images per batch, 5 MB each |
| Account | None | Not needed for the free web tool; required for Pro/API |
| Cost | Free | Free web tool; API from $39/yr, Web Pro/Ultra paid |
| Formats | JPEG, PNG, WebP | PNG, JPEG, WebP, HEIC |
| Works offline | Yes, once the page loads | No — needs a server round-trip |
| Compression engine | Your browser's built-in encoders | TinyPNG's proprietary smart-lossy engine |
Yes. Webhackz compresses JPEG, PNG, and WebP images entirely in your browser, so they're never uploaded to a server. It's free, needs no account, and has no 20-image or 5 MB limit — only your device's memory.
Yes. TinyPNG uploads each image to its servers over HTTPS, compresses it there, and stores it for up to 48 hours before deleting it. Webhackz does the compression locally in your browser instead, so nothing is uploaded.
For most photos and graphics the browser-based compressor gives a large size reduction with a quality slider and live preview. TinyPNG's specialized engine can sometimes squeeze a file smaller at the same quality, so if absolute smallest size matters most, it's worth comparing both.
Comparison last verified July 2026. Figures for other products can change — check their sites for the latest.