Compress Images Online Without Uploading

Compress JPG, PNG and WebP images in your browser. Files never leave your device, there is no upload wait and no file-size limit. Adjust quality and download instantly.

Your files never leave your device

Drag and drop files here

PNG, JPG, WebP, GIF, BMP and AVIF · no size limit, nothing uploaded

How to compress an image

Drop your images onto the box above, or browse for them.
Set the quality — 75–85% suits almost every photo.
Optionally resize, which usually saves more than quality alone.
Download individually, or grab everything at once.

Compression happens the moment your files load and re-runs whenever you change a setting, so you can watch the file size respond and stop when the trade-off looks right.

Nothing is uploaded

Most online compressors send your photos to a server, process them there, and send them back. That means your images sit on someone else's hardware, subject to their retention policy.

This tool uses the Canvas API built into your browser. The file is read from disk, re-encoded in memory, and handed back to you. No request is made and no copy exists anywhere else. You can verify it by opening your browser's network tab, or simply by disconnecting from the internet — the page keeps working.

Choosing a quality level

90–100% — visually identical, modest savings. For archival or print.
75–85% — the sweet spot. Typically 60–80% smaller with no difference most people can see.
50–70% — noticeable softening in gradients and around sharp edges. Fine for thumbnails.
Below 50% — visible blocking artefacts. Only for previews.

Resizing beats compressing

A 4000-pixel-wide photo displayed in an 800-pixel column wastes about 96% of its data. File size scales with the area of an image, so halving the width and height cuts the pixel count to a quarter before compression even begins. If your image is larger than it will ever be displayed, resize first — then compress.

Which format should you output?

WebP is the best default for the web: broadly supported since 2020 and meaningfully smaller than JPG at matching quality. JPG remains the safest choice for email attachments and older software. PNG is lossless and belongs to logos, screenshots and anything needing transparency — using it for photographs produces needlessly enormous files.

Frequently asked questions

Are my images uploaded to a server?

No. Compression runs in your browser using the Canvas API, so the image data never leaves your device and no copy is stored anywhere. You can confirm this by opening your browser's network tab, or by disconnecting from the internet after the page loads — the tool keeps working.

Is there a file size or file count limit?

There is no limit imposed by the tool, because there is no server to pay for. The practical ceiling is your device's memory. Very large images — above roughly 50 megapixels — may be slow on older phones.

What quality setting should I use?

For photos on the web, 75–85% is the usual sweet spot: file sizes drop by 60–80% with differences most people cannot see. Below 60% you start to notice blocking around edges and in smooth gradients like skies.

Why did my PNG get bigger instead of smaller?

PNG uses lossless compression that is already efficient for flat graphics, logos and screenshots. Re-encoding such an image can add bytes. For photographs saved as PNG, converting to JPG or WebP will cut the size dramatically — use the image converter for that.

Images