HTTP Authentication Header Builder
Build Bearer, UTF-8 Basic or a named API-key header locally.
Enabling local controls…
1. Source and settings
Local processing only; nothing is fetched, executed, uploaded or persisted. Each field32KiB; complete output1MiB. CPU work uses a cancellable Worker:10s startup/1s processing. Editing clears old results and exports.
Model, limits and sources
Basic uses UTF-8; confirm server charset support. No requests or authentication tests. API keys use printable ASCII. Header values can contain secrets: copy/export is explicit. Controls and header injection are rejected.
Source controls inspected2026-10-19; model reviewed2026-10-19.
2. Complete result
Choose an operation and process the input.
How to use this tool
Enter local input, review the explicit options and model, then run and export the complete result.
When not to use it
Basic uses UTF-8; confirm server charset support. No requests or authentication tests. API keys use printable ASCII. Header values can contain secrets: copy/export is explicit. Controls and header injection are rejected.