Compress Images Without an App
You don't need Photoshop, Lightroom, or any desktop app to compress images. Modern browsers can compress images locally using the Canvas API — free, private, and instant.
What you can do without any app
- Compress JPG, PNG, and WebP to a lower file size
- Compress to an exact KB target for form uploads
- Convert between formats (JPG, PNG, WebP) while compressing
- Resize dimensions before compression
- Compress batches of files and download as ZIP
How browser compression works
The Canvas API allows JavaScript to read pixel data, apply quality settings, and re-encode images as JPEG, PNG, or WebP — all inside the browser tab, using your CPU. The result is downloaded directly from the browser, never passing through Irreva's servers.
Frequently Asked Questions
Is browser compression as good as Photoshop?
For standard quality reduction (75-90%), results are comparable. For ultra-fine control over compression artifacts, Photoshop's 'Save for Web' gives more options.
Does it work on mobile?
Yes. All Irreva image tools work in mobile browsers on iOS and Android.