OpenScreenShot

Open-source screenshot tool — full-page, region, and visible-area capture with annotation and PDF export.

OpenScreenShot is a free, open-source screenshot extension — zero data leaves your device, no account needed, no telemetry, no third-party services.

Privacy

OpenScreenShot is privacy-first unlike the other tools:

• All capture, annotation, and export happens entirely locally in your browser
• No data is ever uploaded, collected, or transmitted
• No analytics, no ads, no third-party services
• The extension uses only the permissions it needs: activeTab (current page), scripting (scroll measurement), storage + unlimitedStorage (settings + image handoff), downloads (save files)
• Never requests broad <all_urls> host permissions

Capture modes

• Full Page — Scrolls and stitches the entire page into one seamless image. Fixed headers appear once at the top. Live progress bar shows capture status.
• Visible Area — Captures exactly what's on screen now. Instant.
• Selected Region — Click and drag to select any area on the page. Supports resize handles, keyboard nudging (arrow keys, Shift = ×10), cancel (Esc) and confirm (Enter).

Annotation editor

After every capture, the full-screen editor opens in a new tab. Annotate your screenshot before exporting:

• Drawing tools: Rectangle, Arrow, Freehand pen, Text (click-to-type overlay), Blur (pixelate an area), Crop (drag a region and apply)
• Style controls: Pick from 8 colors, adjust stroke width (3/6/12), and font size (12–96px) — your settings are remembered across sessions
• Editing: Select, move, and resize annotations with corner/edge handles; undo/redo (?Z/??Z); delete (?)
• Navigation: Scroll-wheel zoom toward cursor, space-drag or middle-click to pan, fit/100% zoom buttons

Export

Export your annotated screenshot from the editor:

Settings

• Theme: Light, Dark, or System-following
• Default format: PNG / JPEG / WebP / PDF
• Quality: Adjustable slider for JPEG/WebP/PDF
• Filename template: Customizable with {date}, {time}, {title}, {w}, {h} tokens
• PDF defaults: Page size, orientation, multi-page, margin

Open source

MIT licensed. Source code on GitHub. Contributions welcome.