ToolPDFsImage Compressor
Reduce image file sizes with adjustable browser-side compression.
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Compress image files with adjustable quality.
Output
How it works
Uploading images to a website, blog, or portfolio is much faster when those images are properly compressed. Large image files slow down page load times, which hurts both user experience and search rankings. ToolPDFs Image Compressor reduces the file size of JPG, PNG, and WebP images by adjusting the compression quality, all inside your browser using the HTML canvas API. No image is ever sent to a server, which means photos of people, private documents, and internal assets stay completely private.
You choose a quality level, then download the compressed image. Lower quality values produce a smaller file with more visible compression artifacts, while higher values keep the image looking sharp at a modest size reduction. For web use, a quality of 70 to 85 is usually the sweet spot: the file is significantly smaller but the compression is nearly invisible.
Image Compressor includes 20 free operations every day, files up to 25 MB, and no signup. It works on any modern browser including Safari on iPhone and Chrome on Android.
Features
- Compresses JPG, PNG, and WebP images directly in your browser.
- Adjustable quality slider so you choose the size and quality trade off.
- No server upload. Your images stay private on your device.
- Preview file size savings before downloading.
- Free with no account and files up to 25 MB.
Frequently asked questions
Will compressing an image change its dimensions?
No. The tool compresses the image at its original dimensions. Only the file size changes. Use the Image Resizer tool if you also want to change the pixel width or height.
Which image formats does this tool support?
JPG and PNG are fully supported. WebP works in most modern browsers. Other formats may be converted to JPG during the compression process.
Is my image sent to a server?
No. All processing uses the browser canvas API. Your image never leaves your device.
What quality setting should I use for web images?
A quality of 70 to 85 usually gives the best balance for web use. Use 85 to 95 for portfolio images where detail matters, and 60 to 70 for thumbnails or previews.
Can I compress multiple images at once?
The current tool handles one image at a time. Upload, compress, download, then repeat for the next image.