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StitchProof founding preview

Check the math. Compare the revision. Keep the report.

StitchProof reviews supported amigurumi round math in your browser, tracks corrections, and compares pattern versions without uploading your pattern.

No accountBrowser-local processingDeterministic checks only
Private by design: pattern text, titles, names, notes, corrections, and stitch values stay in this browser. FiberTools does not upload them or include them in analytics. Nothing is saved unless you explicitly choose browser-local saving or download a backup. Payment verification sends only a random project ID and recovery credential; Stripe handles your payment details.

Keep this project and recover access

Analysis, on-screen report preview, and recovery JSON are free. Formatted report printing/PDF and issue CSV exports have a $9 one-time price for one pattern project, including its revisions. No subscription. Stripe shows any applicable tax and the final total before payment. Start a different project for a different pattern.

Your draft starts in memory only. Keep a private recovery backup before paying or closing this tab. It contains your pattern and the credential used to recover paid access on this or another device; do not share it. FiberTools cannot recover a lost draft or lost recovery credential.

Paid exports have not been verified for this project. Checking checkout availability…

Designer pattern

Enter up to 200 amigurumi rounds. The original text is never changed by a correction.

3/200 rounds
Pattern metadata

Use US crochet terminology and one round per line. Unsupported notation is labeled for human review instead of guessed. Each pattern input supports up to 250,000 characters; recovery JSON works even before the round math can be reviewed.