How to Modify HTTP Headers in Chrome (2025)

Two practical paths: DevTools for quick experiments, or an MV3 extension for repeatable request header edits.

Install for Chrome Manual install See MV3 guide
Promo showing share and one‑click apply flow

Option A — Extension (recommended)

  1. Install the Chrome header editor extension.
  2. Create a header entry to set or append request headers.
  3. Use a share link to preview and apply configs.

Option B — DevTools Overrides

For one‑off tests, DevTools can override requests. It’s manual and not persistent across sites, but handy in a pinch.