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Header Override vs Rowfill

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 Rowfill
DetailHeader Override logo Header OverrideRowfill logo Rowfill
What it doesOpen-source browser extension to modify HTTP request and response headers and cookies Chrome and Edge extension that automatically fills web forms with Excel data
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelOpen source Not given
PricingNot given Free: €0, up to 25 rows per run; Pro: €9/month or €79/year for unlimited rows; Team: €39/month for 5 seats; Lifetime: €99 once (launch offer for first 100 buyers)
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
  • Record forms once and reuse templates
  • Paste Excel rows and match columns to fields by header
  • Live progress tracking and ability to stop at any time
  • Works with React, Angular, and Vue applications
  • Automatic field redetection when technical IDs change
  • Adjustable delays and automatic stop after three failures
  • CSV export logs for paid plans
  • No password storage or external data transmission
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
  • All data stays in your browser with no server involvement
  • No coding or scripting required
  • Works on internal business applications and modern web forms
  • Free tier available for testing with up to 25 rows
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)8 no change since last check1 no change since last check
Trust Flow (Majestic)31
Citation Flow (Majestic)1813
Referring domains (Majestic)135

3 details filled in for both companies.

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