Freedom251 › Screenshot Annotation Software
OpenScreenShot

What OpenScreenShot is
OpenScreenShot is a free, open-source browser extension for capturing and editing webpage screenshots. It can save a full page, the visible area or a selected region, with exports in PNG, JPEG, WebP and PDF. Its editor offers arrows, boxes, text, blur, mosaic, opaque redaction, spotlight, crop, pen, highlighter and numbered step badges. Screenshots work on desktop Firefox, Chrome, Edge, Brave, Arc and other Chromium browsers. Screen recording is limited to Chrome and includes auto zoom, timeline trimming and WebM export. Capture, editing, export, PDF creation and recording are processed locally in the browser, including when Wi-Fi is off. The extension requires no account and uses no upload, telemetry, watermark or third-party services. An optional npm CLI captures pages through a locally installed Chrome-compatible browser and can save PNG output to a file or standard output. It can also run as an MCP server offering a screenshot capture tool for AI agent clients. The project is MIT licensed. Region selection is confined to the visible viewport, and pages that change height during capture or load images late may produce incomplete or blank results. Settings remain local to each device or profile.
Who it suits
OpenScreenShot suits people who need to capture, annotate and export webpages in a supported desktop browser without creating an account. Its Chrome-only recording and optional CLI or MCP server may also suit users capturing pages for documentation or agent workflows.
What it does well
- Captures full pages, visible areas or selected regions
- Exports PNG, JPEG, WebP and PDF
- Annotation tools include blur and opaque redaction
- Works locally, including with Wi-Fi off
- No account, upload, telemetry, watermark or third-party service
- MIT licensed and available at no charge
What to know first
- Recording is available only in Chrome
- Region selection cannot extend below the visible viewport
- Pages that grow or load images late may be captured incompletely
- Settings do not sync between devices or profiles
Limits
The free plan is listed as free and requires no sign-up. Region selection is viewport-only; recording works only in Chrome, and pages that change height or load images late may be incomplete or blank.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Free | no account · no watermark · no cloud | Free |
As openscreenshot.app lists them, read 28 Sept 2026. The maker's own page has the final word.
Getting started
- Visit the OpenScreenShot website.
- Add the browser extension to a supported desktop browser.
- Capture a full page, the visible area or a region in the viewport.
- Annotate the capture and export it as PNG, JPEG, WebP or PDF.
- For recording, use Chrome; optionally use the npm CLI with a locally installed Chrome-compatible browser.
Verdict
Choose OpenScreenShot for local webpage capture, annotation and export across its supported desktop browsers. Consider its limits if you need recording outside Chrome, region selection below the fold or settings synced across devices.
Questions
How much does OpenScreenShot cost?
The Free plan costs nothing and requires no sign-up.
Which browsers can capture screenshots?
Screenshot capture works on desktop Firefox, Chrome, Edge, Brave, Arc and other Chromium browsers.
Which browsers can record?
Screen recording is available only in Chrome.
What export formats are supported?
The extension exports PNG, JPEG, WebP and PDF. Recording can be exported as WebM.
Is OpenScreenShot open source?
Yes. It is open source under the MIT license.
Does it require an account or internet connection?
No account is required, and capture, editing, export, PDF creation and recording work locally, including with Wi-Fi off.
Facts from OpenScreenShot's own pages
- Annotation
- Its editor supports arrows, rectangles, text, blur, mosaic, opaque redaction, spotlight, crop, pen, highlighter, and numbered step badges. · openscreenshot.app, 28 Sept 2026
- Annotation Tools
- The editor supports arrows, boxes, text, and blur. · openscreenshot.app, 28 Sept 2026
- Browser extension
- Yes · openscreenshot.app, 24 Sept 2026
- Browser support
- Screenshots work on desktop Firefox, Chrome, Edge, Brave, Arc, and other Chromium browsers, while recording is Chrome-only. · openscreenshot.app, 28 Sept 2026
- Chrome Capture Limit
- Chrome limits captureVisibleTab to about two calls per second. · openscreenshot.app, 28 Sept 2026
- Capture limitation
- Region selection is viewport-only, so a region cannot extend below the fold during selection. · openscreenshot.app, 28 Sept 2026
- Capture Modes
- Users can capture a full page, visible area, or a selected region. · openscreenshot.app, 28 Sept 2026
- CLI
- The separate openscreenshot CLI captures webpages from a locally installed Chrome-compatible browser and can write PNG output to a file or stdout. · openscreenshot.app, 28 Sept 2026
- CLI Tool
- The optional npm CLI captures screenshots from a terminal and can run as an MCP server. · openscreenshot.app, 28 Sept 2026
- Company Identity
- OpenScreenShot is associated with @PGHQdev and OpenTechCheck. · openscreenshot.app, 28 Sept 2026
- Core function
- OpenScreenShot captures full webpages, visible areas, or selected regions from a browser. · openscreenshot.app, 28 Sept 2026
- DevOps and CI/CD
- The maker positions the CLI for incident reports, runbooks, postmortems, documentation, release notes, and visual diffs in CI/CD pipelines. · openscreenshot.app, 28 Sept 2026
- Dynamic-page limitation
- The capture engine measures page height once, so pages that grow during scrolling or load images late may be incomplete or blank. · openscreenshot.app, 28 Sept 2026
- Export formats
- The editor exports PNG, JPEG, WebP, and PDF files. · openscreenshot.app, 28 Sept 2026
- Free and Open Source
- The tool is free, open source, and MIT licensed. · openscreenshot.app, 28 Sept 2026
- Free plan
- Yes · openscreenshot.app, 24 Sept 2026
- License
- OpenScreenShot is open source under the MIT license. · openscreenshot.app, 28 Sept 2026
- Local Processing
- All capture, annotation, and export processing runs locally in the browser. · openscreenshot.app, 28 Sept 2026
- MCP Integration
- The MCP server provides a capture_screenshot tool for AI agent clients. · openscreenshot.app, 28 Sept 2026
- Measurement tools
- No · openscreenshot.app, 24 Sept 2026
- Network Behavior
- The extension makes no network request and uses no third-party services. · openscreenshot.app, 28 Sept 2026
- No Account Required
- Users can capture screenshots without creating an account. · openscreenshot.app, 28 Sept 2026
- Works Offline
- Capture, editing, export, PDF, and recording work locally, including with Wi-Fi off. · openscreenshot.app, 28 Sept 2026
- PDF Export
- PDF export uses a built-in writer and the browser's CompressionStream without network requests. · openscreenshot.app, 28 Sept 2026
Where OpenScreenShot stands on Freedom251
- Screenshot Annotation Software#28 of 76