Image Compressor
Reduce the file size of your JPG, PNG and WebP images while keeping them sharp. Adjust quality, set an optional target size, and compress right in your browser — no uploads.
To compress an image, drop your JPG, PNG or WebP files in, set a quality level or target size, and download the smaller versions — 100% in your browser.
Drop your files here, or choose files
Compress images up to 90% smaller while keeping sharp details — 100% in your browser.
Zero Server Uploads
Files process in local RAM
Instant WASM Speed
No waiting queues or lags
Unlimited Batching
Convert files without limits
Suggest a Feature or Improvement for Image Compressor
Need custom options, higher limits, or extra format support? Let our engineering team know!
How to use Image Compressor
- 1Add the images you want to shrink (JPG, PNG or WebP).
- 2Choose a quality level, or set an optional target file size in MB.
- 3Click Compress; each image is re-encoded locally on your device.
- 4Compare the before/after sizes, then download individually or as a ZIP.
How it works
Add your images, choose a quality level or a target file size, and each image is re-encoded on your device. You'll see the original size, the compressed size, and the exact percentage saved for every file.
The original dimensions are preserved unless you explicitly choose a maximum size, so images stay sharp.
Quality vs. target size
Use the quality slider for direct control, or set a target file size and the compressor will iterate to get as close as possible while keeping the image usable.
For photos, a quality around 75–85% typically cuts file size dramatically with no visible difference. Flat graphics and screenshots often compress even further.
Why compress images
Smaller images load faster, improve Core Web Vitals, save bandwidth, and make email attachments and uploads painless.
Because compression runs locally, you can process sensitive images — receipts, documents, personal photos — without them ever leaving your device.
Format comparison
| Quality | File size (photo) | Looks like |
|---|---|---|
| q92 (high) | 224 KB | Visually identical to original |
| q80 (recommended) | 81 KB | Excellent — the web sweet spot |
| q60 (aggressive) | 26 KB | Fine for thumbnails; slight softening |
| WebP q80 | 19 KB | Smallest, clean edges |
Measured on the same 1600 × 1067 photograph. Lower quality = smaller file, more artifacts.
Input & output compatibility
Accepts
- JPG / JPEG
- PNG
- WebP
Produces
- Same format as the input, re-encoded smaller
The compressor keeps each file's original format and reduces size via quality and optional resizing — so a PNG stays a PNG, a JPG stays a JPG.
Real file-size examples
Real compression results from the sample photo at descending quality levels:
Photograph — 1600 × 1067 px (started at 2.9 MB PNG)
Quality 80 is the sweet spot for web images — near-invisible loss for a fraction of the size. Resizing to the dimensions you'll actually display saves even more than quality alone.
When should you use each format?
There is no single best format — each wins for a different kind of image. Use this as a quick decision guide:
Common problems & solutions
Quality dropped too much
Raise the quality slider toward 85–90, or set a target size that's less aggressive. Compression is a trade-off between size and fidelity.
File didn't shrink much
The image may already be compressed, or it's a flat graphic PNG. Try also reducing the maximum dimensions — a smaller pixel count is often the biggest saving.
PNG won't compress as small as I expected
PNG is lossless, so it can't discard detail the way JPG/WebP do. For big savings on a photo, convert it to JPG or WebP.
Is this private?
This image compression runs entirely in your browser using the built-in canvas and WebAssembly engine. Your files are read from local memory, processed on your own device, and never uploaded to a server.
Because nothing leaves your machine, there is no upload wait, no queue, and no copy of your image sitting in someone else's storage. Closing the tab discards everything — we keep no logs of the files you open and have no account system that could retain them.
That also means it works offline once the page has loaded, and there is no per-file limit imposed by an upload quota — the only ceiling is your device's available memory.
Frequently Asked Questions
Are my images uploaded to a server?
No. Every conversion runs locally in your browser using your device's own processor. Your images never leave your computer or phone, and nothing is stored on our servers.
Which formats can I compress?
JPG, PNG and WebP. Each file is compressed in its original format, so a PNG stays a PNG and a JPG stays a JPG. To change format, use one of the dedicated converters.
Can I hit an exact target file size?
You can set a target and the compressor will get as close as it can by adjusting quality. Exact sizes aren't guaranteed because image content determines how far it can compress, but the result is usually within a small margin.
Will compression blur my image?
At sensible quality levels the change is invisible. Very aggressive settings can introduce artefacts, which is why the before/after preview lets you check the result before downloading.
Can I convert several images at once?
Yes. Drop or select multiple files and they'll be processed in a controlled queue so your browser stays responsive. Each file shows its own progress, and you can download them individually or all together as a ZIP.