How to use this tool
- Drop one or more images (JPG, PNG, or WebP) into the box, or click it to browse.
- Pick an output format — WebP for the smallest file size, JPEG for maximum compatibility, or PNG if you need lossless output.
- Adjust the quality slider — lower means smaller files but more visible compression artifacts.
- Click "Compress" and download each result individually once it finishes.
Common mistakes to avoid
- Don't use PNG as the output format expecting a big size reduction — PNG is lossless, so the quality slider barely changes its size; pick WebP or JPEG instead if size matters more than exact lossless output.
- If the image needs to stay transparent, don't choose JPEG — it flattens transparency to a solid background.
How browser-based image compression works
This tool draws your image onto an HTML canvas at its original resolution, then re-encodes it using the browser's own built-in image encoder at the quality level you choose — the same underlying technology a native app would use, just running in a page instead of an installed program. No image data is ever transmitted anywhere in the process.
Frequently asked questions
- Why does converting to WebP shrink the file so much more than PNG?
- WebP uses a modern lossy compression algorithm tuned for photographic and mixed content, similar in principle to JPEG but more efficient — typically 25–35% smaller than an equivalent-quality JPEG, and far smaller than PNG for anything that isn't flat-color graphics. PNG is lossless, so re-saving as PNG barely changes file size.
- Will compressing lose image quality?
- Yes, if you choose WebP or JPEG — both are lossy formats, so some detail is discarded to save space. The quality slider controls that trade-off; 75–85% is usually visually indistinguishable from the original while cutting file size significantly.
- Is there a limit on how many images or how large a file I can compress?
- No limit is imposed by this tool — it's bound only by your device's available memory, since nothing is uploaded to a server with its own size quota.
- What happens to a transparent PNG if I convert it to JPEG?
- JPEG doesn't support transparency, so any transparent areas become solid (typically white). Use WebP instead if you need to keep transparency while still compressing.
How GetByteRush compares
Most free tools for this online work the same way: you upload your file to their server, wait, then download the result — which means your file (and often your email, for a "free" account) sits on someone else's infrastructure. Here's the actual difference:
| Feature | GetByteRush | Typical free image compressors (TinyPNG, Compressor.io, etc.) |
|---|---|---|
| Image ever leaves your device | No — 100% client-side | Yes — uploaded to a server to compress |
| Batch size limit | None imposed by us | Often capped (e.g. 20 images or a few MB each) on free tiers |
| Compression speed | Instant — no upload/download round trip | Limited by your upload speed and their server queue |
| Account required for bulk use | Never | Often, past a free daily quota |
("Typical online tools" reflects publicly documented behavior of common free file-processing sites as of 2026 — always check a specific competitor's own privacy policy and pricing page, since these details change.)