Compress
Compress JPEG images
Compress JPEG photos in your browser with a quality slider or an exact target size. Batch processing, and your files are never uploaded.
Drop images here
or · drop a folder · paste from clipboard
JPEG has been the default format for photographs for three decades, and most photos you meet are already JPEGs saved at some quality setting you did not choose. Re-compressing one is about finding the point where the file gets meaningfully smaller before the artefacts become visible.
A word of warning specific to JPEG: it is lossy, and re-saving a JPEG as a JPEG always loses a little more. If your source is already heavily compressed, expect a smaller saving than you would get from a PNG. The before-and-after sizes are shown for every file so you can judge whether the trade was worth it.
If the destination allows it, converting to WebP instead usually beats re-compressing the JPEG by a wide margin at the same visual quality. Switch the output format above to compare the two on your own images.
How to compress jpeg images
- Drop your JPEG files onto the box above.
- Choose a quality level, or set a target size in kilobytes.
- Download the compressed files individually or as a ZIP.
Frequently asked questions
Are my images uploaded to a server?
No. The conversion runs inside your browser using WebAssembly, so the image data never leaves your device. That also means there is no queue, no account, and no file size cap imposed by a server.
Does compressing a JPEG again reduce quality?
Yes, a little — JPEG is lossy, so every save discards some data. At quality 80 the loss is usually invisible at normal viewing size, but repeatedly re-saving the same file will gradually degrade it. Always compress from your original rather than from a previous output.
Why did my JPEG barely get smaller?
Because it was already well compressed. A photo saved at quality 75 has little redundancy left to remove. Resizing it will save far more than compression alone at that point.
Can I convert several images at once?
Yes. Drop in as many files as you like — or a whole folder — and they are processed in parallel across your CPU cores. When they finish you can download them individually or grab everything as a single ZIP.