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About Redact & Annotate
Redact & Annotate — free, private, browser-based image tool
Hide sensitive info and mark up images — black-out or blur regions, add arrows and text, then export. Photos never leave your device. It takes image and gives you PNG. It runs in your browser, so the file is processed on your own device.
Why use Redact & Annotate
- ·Files stay on your device — nothing is uploaded
- ·No signup needed
- ·Works in any modern browser, on any OS
- ·Free daily use; Pro removes limits and watermarks
How to use it
- 1Drop an image file on the page, or click to choose one.
- 2Pick the options you want.
- 3Download the PNG file.
What Redact & Annotate does
Hide sensitive info and mark up images — black-out or blur regions, add arrows and text, then export. Photos never leave your device. The result is a PNG file you download directly.
How it works
Uses Canvas2D and WebGL2 with OffscreenCanvas for parallel processing. Filters run as GPU shaders where supported, falling back to CPU SIMD via WebAssembly. The processing code runs inside the page, so your file is not uploaded to a server — you can confirm this in your browser's DevTools → Network tab.
Frequently asked questions
Does Redact & Annotate upload my files?+
No. Redact & Annotate runs in your browser and processes the file on your device. Nothing is sent to our servers.
Is Redact & Annotate free?+
Yes, with a daily free allowance and no signup. Xonvert Pro ($4.99/month) removes the daily limits and the watermark on exported files.
Do I need to install anything?+
No. It works in any modern browser on Windows, macOS, Linux, ChromeOS, Android and iPad.
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