Best alternatives to ModBox – Modify headers, block requests (2026)
10 Chrome extensions that do a similar job to ModBox, closest first. Each shows real store users, its rating, how recently it was updated and how many permissions it asks for.
ModBox – Modify headers, block requests today
ModBox alternatives, compared
- 1
tweak: mock and modify HTTP requests
Mock or modify HTTP requests, plus a developer toolbox for any page. Test, develop and demo your web app
≈60K users4.5★ from 240 ratingsUpdated 3 days ago7 permissions- About 6.0× more users than ModBox
- Asks for more permissions (7 vs 3)
- 2
Modify Header Value (HTTP Headers)
Add, modify or remove a header for any request on desired domains.
≈40K users3.3★ from 55 ratingsUpdated 5 months ago3 permissions- About 4.0× more users than ModBox
- Updated less recently
- 3
Requestly: Intercept & Modify HTTP Requests
Intercept & modify HTTP(S) traffic: redirect URLs, modify headers, inject scripts, mock REST & GraphQL APIs, and more.
≈300K users4.7★ from 1.8K ratingsUpdated 6 weeks ago12 permissions- About 30× more users than ModBox
- Asks for more permissions (12 vs 3)
- 4
simple-modify-headers
Simple Modify headers
≈40K users4.3★ from 23 ratingsNot updated for 2+ years6 permissions- About 4.0× more users than ModBox
- Updated less recently
- Asks for more permissions (6 vs 3)
- 5
Header Editor Pro – Modify HTTP Headers
Modify HTTP request and response headers. Unlimited profiles, domain and tab group filters, 7 languages. Free and open source.
≈4K users5.0★ from 4 ratingsUpdated 4 days ago5 permissions- About 2.5× fewer users than ModBox
- Asks for more permissions (5 vs 3)
- 6
xHeader - Modify HTTP headers
A modern ModHeader alternative for modifying request headers and response headers with profiles, filters, tab targeting, and sync.
≈5K usersNot rated yetUpdated 4 months ago4 permissions- About 2.0× fewer users than ModBox
- Updated less recently
- Asks for more permissions (4 vs 3)
- 7
Modify HTTP Headers (HTTP Header) - FlexHeader
Add, modify & delete HTTP request/response headers with URL & regex rules. Open-source, private, no data collection
≈7K users4.9★ from 31 ratingsUpdated 2 months ago3 permissions- A similar number of users to ModBox
- 8
Modify Http Header
Modify Http Request Or Response Header.
≈1K users3.8★ from 4 ratings3 permissions- About 10× fewer users than ModBox
- 9
Modify Header
Manage HTTP request and response header modifications with a clean dashboard UI.
≈1K users5.0★ from 5 ratingsUpdated 8 days ago6 permissions- About 10× fewer users than ModBox
- Asks for more permissions (6 vs 3)
- 10
Inssman: Open-Source: Modify HTTP Request
Intercept HTTP(S) Request, Modify Headers, Log headers, Change Response, Block Request, Redirect, Custom HTML/CSS/JS/JSON
≈5K users4.1★ from 15 ratingsNot updated for 2+ years10 permissions- About 2.0× fewer users than ModBox
- Updated less recently
- Asks for more permissions (10 vs 3)
ModBox alternatives: questions
What is the best alternative to ModBox?
By users, the most popular alternative is Requestly: Intercept & Modify HTTP Requests with ≈300K users and a 4.7-star rating. The closest match by what it does is tweak: mock and modify HTTP requests.
Which ModBox alternative has the best rating?
Requestly: Intercept & Modify HTTP Requests has the highest rating of these alternatives with 50+ ratings: 4.7 out of 5 from 1.8K ratings.
How many alternatives to ModBox are there?
We list 10 close alternatives to ModBox on the Chrome Web Store, picked by what they do and ranked by how close they are.
Users and ratings are the figures shown on the Chrome Web Store, re-checked continuously. Alternatives are matched on name, description, category and topic. Browse best-of lists by niche.