Browser extensions that do one job properly. Everything runs on your own machine — no uploads, no analytics, no tracking, no accounts. The only thing any of these tools sends is your license key, to confirm it, and only if you buy the paid version.

Full Page Screenshot

Capture an entire webpage in one click, and black out private info before the picture exists.

Actually captures the whole page: lazy-loaded images resolved, sticky headers shown once instead of repeating
PNG, JPEG and PDF, all free: whole page, a selected area, or a single scrolling panel. Copy to clipboard, capture delay, your own file names
Hide private info before the shot, or let it find emails, card numbers, phone numbers and API keys for you. 3 redacted captures a month free; Pro is unlimited and captures whole lists of pages
Only ever sees the tab you're capturing. Capturing a list of pages asks for wider access when you start one, never before
Installs asking for nothing, and speaks seven languages

Chrome Web Store How redaction works Try the demo Privacy policy

Modify HTTP Headers & CORS Unblock — HeaderForge

Set, remove and override HTTP headers, unblock CORS, block or redirect requests, and see which rule fired.

Works on XHR, fetch and POST requests, not just page loads
Free for good: unlimited request and response rules, regex matching, profiles, one-click CORS, presets, block and redirect, ModHeader import
Shows you when a rule actually fires. Pro adds per-rule counts, a live request list, unlimited URL tests and variables
Coming from ModHeader? Move your rules in three steps
In English, Spanish, Portuguese, German, French, Japanese and Chinese — the whole interface, including what each rule does in plain words

Chrome Web Store ModHeader alternative Privacy policy

ContrastForge — WCAG color contrast audits

Check every piece of text on a page against WCAG 2.2 contrast rules, and hand the client a report.

Scans the whole page, including text on semi-transparent layers and gradients, which simple checkers get wrong
For each failure: the WCAG criterion it breaks and the nearest color that passes
Free: the pair checker, an eyedropper and 5 full-page scans a month. Pro ($149/year) adds unlimited scans and PDF/CSV audit reports with your own logo
In review at the Chrome Web Store and Firefox Add-ons

About ContrastForge WCAG 2.2 AA checklist Privacy policy

Sapir Software

Full Page Screenshot

Modify HTTP Headers & CORS Unblock — HeaderForge

ContrastForge — WCAG color contrast audits