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HeaderFlex - Modify HTTP Requests

Chrome extension by knothhe · Productivity · Developer

  • Established publisher

A Chrome extension in Productivity · Developer with 54 users, barely installed. Audience over the last 30 days: +15.

Every site you visit. This extension can read and change the content of any page you open.

What the developer says, and 5 screenshots

Loading from the Chrome Web Store. Open the listing if it does not appear.

Users
54
Rating
4.5 (2 ratings)
Users, last 30 days
+15
Rating, last 30 days
Steady over 30 days
Version
1.0.11
Updated in the store
2026-09-14
Published
2026-07-16
Manifest
V3
Browser access
10 permissions, 1 site pattern

How it has moved

Users
+15 since 02.10
32-54 · 14 readings
  1. 2026-10-0434
  2. 2026-10-0832
  3. 2026-10-0938
  4. 2026-10-1046
  5. 2026-10-1347
  6. 2026-10-1648
  7. 2026-10-1847
  8. 2026-10-1948
  9. 2026-10-2150
  10. 2026-10-2248
  11. 2026-10-2351
  12. 2026-10-2450
  13. 2026-10-2954
  14. 2026-10-3154
Rating
unchanged since 02.10
reviewsrating 4.50 · 14 readings
  1. 2026-10-04reviews2rating4.50
  2. 2026-10-08reviews2rating4.50
  3. 2026-10-09reviews2rating4.50
  4. 2026-10-10reviews2rating4.50
  5. 2026-10-13reviews2rating4.50
  6. 2026-10-16reviews2rating4.50
  7. 2026-10-18reviews2rating4.50
  8. 2026-10-19reviews2rating4.50
  9. 2026-10-21reviews2rating4.50
  10. 2026-10-22reviews2rating4.50
  11. 2026-10-23reviews2rating4.50
  12. 2026-10-24reviews2rating4.50
  13. 2026-10-29reviews2rating4.50
  14. 2026-10-31reviews2rating4.50
Users
+24 since 31.08
30-54 · 29 readings
2026-09-14: released 1.0.11
  1. 2026-08-3130
  2. 2026-09-0231
  3. 2026-09-0333
  4. 2026-09-0434
  5. 2026-09-0634
  6. 2026-09-0835
  7. 2026-09-1033
  8. 2026-09-1334
  9. 2026-09-1535
  10. 2026-09-1636
  11. 2026-09-2040
  12. 2026-09-2139
  13. 2026-09-2542
  14. 2026-09-2640
  15. 2026-09-2839
  16. 2026-10-0434
  17. 2026-10-0832
  18. 2026-10-0938
  19. 2026-10-1046
  20. 2026-10-1347
  21. 2026-10-1648
  22. 2026-10-1847
  23. 2026-10-1948
  24. 2026-10-2150
  25. 2026-10-2248
  26. 2026-10-2351
  27. 2026-10-2450
  28. 2026-10-2954
  29. 2026-10-3154
Rating
unchanged since 31.08
reviewsrating 4.50 · 29 readings
2026-09-14: released 1.0.11
  1. 2026-08-31reviews2rating4.50
  2. 2026-09-02reviews2rating4.50
  3. 2026-09-03reviews2rating4.50
  4. 2026-09-04reviews2rating4.50
  5. 2026-09-06reviews2rating4.50
  6. 2026-09-08reviews2rating4.50
  7. 2026-09-10reviews2rating4.50
  8. 2026-09-13reviews2rating4.50
  9. 2026-09-15reviews2rating4.50
  10. 2026-09-16reviews2rating4.50
  11. 2026-09-20reviews2rating4.50
  12. 2026-09-21reviews2rating4.50
  13. 2026-09-25reviews2rating4.50
  14. 2026-09-26reviews2rating4.50
  15. 2026-09-28reviews2rating4.50
  16. 2026-10-04reviews2rating4.50
  17. 2026-10-08reviews2rating4.50
  18. 2026-10-09reviews2rating4.50
  19. 2026-10-10reviews2rating4.50
  20. 2026-10-13reviews2rating4.50
  21. 2026-10-16reviews2rating4.50
  22. 2026-10-18reviews2rating4.50
  23. 2026-10-19reviews2rating4.50
  24. 2026-10-21reviews2rating4.50
  25. 2026-10-22reviews2rating4.50
  26. 2026-10-23reviews2rating4.50
  27. 2026-10-24reviews2rating4.50
  28. 2026-10-29reviews2rating4.50
  29. 2026-10-31reviews2rating4.50

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing up to 2 times a day and record a point only when something moves. History beyond ninety days is in the app.

What it can reach

Every site you visit. This extension can read and change the content of any page you open.

Show the remaining 7

The full permission history for this extension

Version history

  1. Version 1.0.11

What changed recently

  1. Package size changed
  2. Renamed from "HeaderFlex" to "HeaderFlex - Modify HTTP Requests"
  3. Released version 1.0.11 (was 1.0.10)

The publisher

knothhe publishes 3 listings we track, 64 users between them. Listed website: headerflex.app.

  1. Url tools knothhe · Productivity · Tools · published 2025-01-01 7 users
  2. copy-enhancer knothhe · Productivity · Tools · published 2025-12-30 3 users (last published figure)

Like this one

Listings the catalog judges closest in what they say they do.

  1. HeaderMod Describes nearly the same job, smaller audience 48 users
  2. Header Modifier Describes nearly the same job, smaller audience 7 users
  3. HeaderKits Describes nearly the same job, smaller audience 4 users ★ 5.0
  4. ModHeader Lite Describes nearly the same job, smaller audience 3 users
  5. HeaderCraft Pro: Fast & Private MV3 Request Describes nearly the same job, smaller audience 3 users (last published figure)

The top 5 only. The full comparison, with why each one is close, is on the alternatives page; ranking a whole neighbourhood by your own criteria is in the app.

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The badge shows the audience and rating from our last pass over the store and links back to this page.

Users and rating on Ext Ops Panel

Markdown

[![Users and rating on Ext Ops Panel](https://extops.dev/extensions/nihfajmdncbbhlnpepklhlgeddbhpdlb/badge.svg)](https://extops.dev/extensions/nihfajmdncbbhlnpepklhlgeddbhpdlb)

HTML

<a href="https://extops.dev/extensions/nihfajmdncbbhlnpepklhlgeddbhpdlb"><img src="https://extops.dev/extensions/nihfajmdncbbhlnpepklhlgeddbhpdlb/badge.svg" alt="Users and rating on Ext Ops Panel" height="20"></a>

Figures come from our own regular passes over the public Chrome Web Store listing, last read on . The store last changed these figures on 2026-10-29. We publish no contact details for extension developers.

Where the data comes from: how the catalog is built