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Image Compressor reduces the file size of a photo by re-encoding it more efficiently, letting you trade a small, often invisible amount of quality for a much lighter file. Smaller images load faster, improve your site's Core Web Vitals, and slip under upload and attachment limits.
You control the result with a quality slider and Low/Medium/High presets, and you choose the output format. JPG is the universally compatible choice; WebP is the modern option that typically produces files 25–35% smaller at the same quality. A live before/after preview with a size readout shows the impact of every change as you make it.
All compression happens in your browser through the Canvas API, so your images are never uploaded to a server. That keeps personal photos and client assets private, and means there are no queues, batch caps, or daily limits to work around.
Image Compressor is most powerful alongside Resize Image and Convert to WebP: resize a photo to its real display size, compress it, and you'll often cut the file weight by 80% or more while keeping it looking sharp, all free and watermark-free.
| Price | Free, no signup, no paywall, no watermark |
|---|---|
| Works on | Any modern browser: desktop, tablet, and mobile |
| Processing | In your browser, files never leave your device |
| Account required | None |
| Category | Image Tools |
Upload a PNG, JPG, or WebP image, it loads locally in your browser
Pick a preset or fine-tune the quality slider while watching the live preview
Choose JPG or WebP output depending on whether you need wide compatibility or maximum savings
Compare before and after, then download the optimised image
Adjustable quality slider plus Low/Medium/High presets for one-click compression
Output as JPG or modern WebP (typically 25–35% smaller than JPG at the same quality)
Side-by-side before/after preview with live file-size and percentage-saved readout
Smart re-encoding that targets file weight while protecting visible detail
Handles PNG, JPG, and WebP input and processes images on your device via the Canvas API
No upload, no watermark, no batch or daily limit
Shrinking product and blog images so pages load faster and score better on Core Web Vitals
Compressing photos to meet upload size limits on forms, marketplaces, and job portals
Reducing email and chat attachment sizes without visibly degrading the picture
Optimising hero images and thumbnails before publishing to a website or CMS
For web use, export as WebP at 75–80% quality, it's the sweet spot of small size and sharp output for most photos
Resize an image to the dimensions it'll actually display at before compressing; a 4000px photo shown at 800px wastes huge file weight
Watch the live preview at 100% zoom on detailed areas (faces, text, edges) to catch quality loss before you commit
Common questions about this tool, its workflow, and what to expect before you use it.
MDN Web Docs
Compares JPEG, PNG, WebP, AVIF and GIF: transparency, compression and browser support.
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Preview
Reduce image file size with adjustable quality, compression presets, and JPG/WebP output.
Use Image Compressor free →Live tool (iframe)
Readers use the real, working tool right on your page, with a small credit line underneath.
Embed card (HTML)
Each page opens the tool already set to that size, so your file is ready for the upload limit in one step.