OpenCapture

What it is

OpenCapture is a free, open-source browser extension for Chrome, Edge and Firefox that captures entire web pages as single images. The extension stitches together the full page—however long—into one PNG or PDF file with no visible seams, then lets you edit it before exporting. You can crop to what matters, draw and add text, blur anything private, and undo every step until you export.

All processing happens locally in your browser; nothing is uploaded to any server unless you choose to buy credits for the optional Supporter watermark feature. No account is required to use any of the core tools. The extension is open source under AGPL-3.0-or-later, with the watermark module as a separate paid component.

Questions from the bench

What is OpenCapture?

OpenCapture is a free, open-source browser extension for Chrome, Edge and Firefox that captures entire web pages as single images, then lets you crop, annotate, blur and export as PNG or PDF—entirely on your device with no account required.

Is OpenCapture free?

Yes. Full-page, visible-area and selected-area capture, crop, annotate, blur, undo and export are free for everyone with no account required. The only paid feature is the tiled watermark tool, a one-time Supporter unlock costing $5 for 1,000 credits.

Does OpenCapture upload my screenshots anywhere?

No. Every capture is rendered and edited locally in your browser. Nothing is sent to any server unless you choose to buy credits for the Supporter unlock.

Which browsers does OpenCapture support?

OpenCapture supports Chrome, Edge and Firefox, all running under Manifest V3.

What does the Supporter unlock include?

A tiled logo or text watermark across your exports with adjustable opacity, position, and angle. It costs $5 for 1,000 credits, paid once, and never expires—no subscription and no charge per export.