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OpenCapture vs Header Override

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

OpenCapture compared with Header Override
DetailOpenCapture logo OpenCaptureHeader Override logo Header Override
What it doesFree full-page screenshot browser extension for Chrome, Edge and Firefox Open-source browser extension to modify HTTP request and response headers and cookies
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelFreemium Open source
PricingFree: Full-page, visible-area and selected-area capture, crop, draw, text, shapes, blur, unlimited undo, and export to PNG or PDF. Supporter: $5 for 1,000 credits (one-time, includes tiled logo or text watermark with custom opacity, position, and angle). Not given
Key features
  • Full-page screenshot capture
  • Visible-area and selected-area capture modes
  • Crop and resize images
  • Draw, text and shapes annotation
  • Blur sensitive information
  • Unlimited undo
  • Export to PNG or PDF
  • Capture history with last 50 screenshots
  • Tiled watermark (Supporter feature)
  • Modify request and response headers with a focused editor interface
  • Scope rules to specific URLs using browser-supported filter patterns
  • Customize response cookies with Domain, Path, SameSite, Lifetime, Max-Age, and Secure attributes
  • Create up to five local rule profiles for different projects and test setups
  • Import and export profiles as local JSON files between browsers
  • Enable, disable, delete, and annotate rules with comments
  • Support for Chrome, Edge, and Firefox
  • All rules stored locally in browser with no server transmission
What makes it different
  • Completely open source under AGPL-3.0-or-later so users can verify no data collection
  • All processing done locally with no uploads unless buying credits
  • No account required for all core features
  • One-time payment for Supporter feature instead of subscription
  • Stitches full pages into seamless single images
  • Open-source with MIT License and full transparency
  • Rules stored entirely locally with no analytics, tracking, or external servers
  • Lightweight alternative to ModHeader
  • URL scoping prevents rules from affecting unintended websites
  • Simple interface requires no coding knowledge
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)Not checked yet no change since last check8 no change since last check
Trust Flow (Majestic)213
Citation Flow (Majestic)2118
Referring domains (Majestic)2513

4 details filled in for both companies.

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