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Header Override vs OpenImmersive Translator

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

Header Override compared with OpenImmersive Translator
DetailHeader Override logo Header OverrideOpenImmersive Translator logo OpenImmersive Translator
What it doesOpen-source browser extension to modify HTTP request and response headers and cookies Free, open-source browser extension for side-by-side translation on any webpage in 199 languages
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelOpen source Freemium
PricingNot given Free: Fast tier up to 5,000 characters per request with no account, 100 welcome credits on signup, 3 PDF document pages per day free preview. Plus: $8/month billed yearly (50% off $16/month), 1,600 credits/month, 10 format-preserving document pages every 10 days, up to 30,000 characters per request.
Key features
  • 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
  • Side-by-side translation on web pages
  • Supports 199 languages
  • Works on Chrome, Firefox and Edge
  • Free translation engines with no account required
  • Translation-only viewing mode
  • Hover translation for individual paragraphs
  • Selection and popup translation
  • Input box translation
  • Document translation with layout preservation
  • Optional AI tiers with credit system
What makes it different
  • 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
  • Open-source code licensed under AGPL-3.0 that anyone can inspect
  • Data stays in browser with free engines; no server intermediary
  • Independent project with no connection to Immersive Translate
  • Free core translation engine needs no sign-up or account
  • Optional local masking hides sensitive data before transmission
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)15 +1 (up) since last checkNot checked yet no change since last check
Trust Flow (Majestic)32
Citation Flow (Majestic)1812
Referring domains (Majestic)131

4 details filled in for both companies.

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