Compress Images for the Web
Website images are usually far larger than the space they are shown in. This tool applies a sensible web default in one pass: it limits the longest side to 1920 px, converts to WebP at quality 78 and removes camera metadata. Every setting can be changed, and nothing leaves your device.
- Processed locally
- No upload, no wait
- No sign-up
- No watermark
Drop images here
or choose files · paste with Ctrl/⌘ V
JPG, PNG, WebP, HEIC, AVIF, GIF, TIFF, SVG, RAW, PSD, JXL, BMP, ICO and more
How to use Compress for Web
- 1
Drop your images, choose files, or paste from the clipboard.
- 2
Adjust the options. The preview updates as you change them.
- 3
Click Compress. Files are processed on your device.
- 4
Download each result or everything as a ZIP.
Why use Aback Images for compress for web
Best-in-class encoders
MozJPEG for JPG, OxiPNG and palette quantisation for PNG, libwebp and libavif for WebP and AVIF, all compiled to WebAssembly.
Live before/after
See the result and its file size on your actual image before processing the batch.
Processed on your device
Your images are decoded, edited and encoded inside this browser tab by Web Workers. Nothing is uploaded to a server.
Never bigger than the original
If compression cannot beat your file, the original is returned unchanged with a note.
Related tools
Clear PageSpeed image warnings: WebP, capped at 1920 px, at the smallest size that still looks identical, measured with SSIM.
Generate WebP/AVIF/JPG widths plus ready-to-paste picture, srcset and sizes markup.
Shrink JPG, PNG, WebP, AVIF and GIF files with MozJPEG, OxiPNG and modern codecs, with a live before/after preview.
Convert JPG to WebP in your browser, ready for images on websites and in apps. Batch, private, no uploads.
Convert PNG to WebP in your browser, ready for images on websites and in apps. Batch, private, no uploads.
Make JPEG photos smaller with MozJPEG, the encoder that beats standard JPEG by 10-15% at the same quality.
Cut PNG size by up to 80% with smart palette reduction and OxiPNG lossless optimisation, keeping transparency.
Re-encode WebP images smaller with libwebp's best settings, including animated WebP.
Frequently asked questions
Why WebP and not JPG?
WebP is typically 25 to 35 percent smaller than JPEG at the same visual quality, and every current browser displays it. If a platform you upload to does not accept WebP, switch Save as to JPG.
Is 1920 px big enough?
For a full-width banner on a large monitor, yes, and most content images are shown far narrower. An image needs about its display width times the screen's pixel density, so a 960 px column needs about 1920 px on a high-density screen. The Responsive Images tool generates several widths with srcset markup.
Are my images uploaded anywhere?
No. Processing happens inside your browser with WebAssembly and Web Workers. The site only downloads the app code and codecs; your files never leave your device. You can confirm this with the live upload counter on the tool, or in your browser's network panel.
Can I process many files at once?
Yes. Drop a whole selection or folder. Files are processed in parallel on several worker threads, each result can be downloaded on its own, and everything can be saved as one ZIP.
Is it free? Is there a file limit or watermark?
It is free with no account, no watermark and no daily limit. The only limit is your device's memory: very large images (over roughly 100 megapixels) may be refused to keep the tab from crashing.