Simple checks.
Explicit limits.

Free early release

Redirect Review is an independent redirect-plan utility. All current checks and reports are free. There is no subscription, checkout, store connection, or automated redirect editing.

Your file stays on your device

The application reads pasted text and selected files in your browser’s memory. It does not upload the CSV, fetch its URLs, or store it on a server. Refreshing clears the working report. Exported JSON and PDFs are saved by you and may contain your URLs; share them deliberately.

Hosting is provided by Cloudflare Pages, which processes web requests. Our usage counts are stored in Cloudflare D1. The application adds no advertising trackers or customer account database. After a successful non-sample check, it sends a temporary random browser-tab identifier and event type to our hosting service. We store daily analysis/report counts. Entries older than 30 days are removed in batches as new events arrive; they may remain longer when the service is inactive. No CSV values, filenames, or mapped URLs are included. We respect browser Do Not Track and Global Privacy Control signals; blocked telemetry never prevents use. Counts describe observed sessions, not verified people. Platform data handling is governed by its own policies. Do not include secrets or personal information in a redirect plan.

What the checker means

Blockers indicate invalid input, conflicting source targets, or loops. Warnings flag duplicate rules, ambiguous paths and multiple hops. Information flags many-to-one mappings for human review. No finding is a guarantee that a production redirect is correct.

URL parsing follows browser URL rules. Hostnames and default ports are normalized; path case, trailing slashes and query strings remain meaningful. Fragments, embedded credentials, protocol-relative URLs, whitespace, and backslashes are not accepted. The checker models exact source-to-target mappings, not wildcard rules or HTTP status behavior.

Limits

Up to 5,000 mappings and 1 MB of text per analysis. No live URL testing, uptime service, content matching, regex evaluation, or ranking prediction. You remain responsible for reviewing and testing your deployment.

Support

For support or feedback, email redirectreview@proton.me. Tell us whether you are preparing a real migration and whether the report helped. Please do not send confidential files. Email is handled through Proton Mail; we use replies to support the product and evaluate demand, not to add you to a mailing list.