Reduce image file size
Make photos smaller with a live quality slider or an exact target size. Compare before and after and batch-process many at once — nothing is uploaded.
Privacy-first: every image is processed locally in your browser. Nothing is uploaded, stored or transmitted to any server.
The three levers of image size
Every oversized image is oversized for one of three reasons, and each has its own fix. Too many pixels → resize the dimensions (the biggest win: halving width and height cuts ~75% of the data). Too little compression → re-encode at quality 75–85, which halves most camera JPGs invisibly. Wrong format → photos stored as PNG or BMP shrink 5–10× just by becoming JPG or WebP.
This tool pulls the compression lever
Use the quality slider with the live before/after view, or set an exact kilobyte target and let the search find the best quality that fits. For the other two levers, the resizer and converter are one click away — and because everything runs in your browser, you can iterate freely without re-uploading anything anywhere.
Frequently asked questions
- Does my image get uploaded?
- No. All compression happens locally in your browser using the Canvas API. Your files never leave your device and are never sent to a server.
- Does compression reduce quality?
- Lossy formats (JPG, WebP, AVIF) trade a little quality for much smaller files, and the quality slider lets you find the right balance. PNG is lossless, so it stays pixel-perfect.
- Which formats are supported?
- You can compress JPG, PNG and WebP. You can also convert a PNG photo to WebP during compression for much smaller files.
- Can I compress to a specific file size?
- Yes. Switch to “Target size” mode and PixelVault searches for the highest quality that fits under your chosen KB limit.
- Can I compress multiple images at once?
- Yes. Drop in as many images as you like and download them individually or together as a single ZIP file.