Overview
Screenshot to timestamped PDF evidence in one drag. URL, title & capture time stamped automatically. For QA, bug reports & audits.
Stop typing timestamps onto screenshots. ProofStamp turns anything visible in your browser into a professional, labelled PDF evidence document — in one drag. How it works 1. Click ProofStamp and drag over the part of the page you need 2. Check the preview, add an optional label ("TC-1142 fail") 3. Download a PDF stamped with the page URL, title, and capture time (local + UTC) Why people buy it • Report-ready: A4 PDF with a clean metadata block — paste straight into audit or QA documentation • Accurate: capture time recorded in local time AND UTC • Fast: about 20 seconds from "I see it" to saved proof • PNG option when you just need the pixels Who uses it QA engineers attaching defect evidence to Jira, Linear or Azure DevOps tickets. Support engineers documenting what a customer actually saw. Compliance and audit analysts collecting SOC 2 and ISO 27001 screenshots. Security reviewers recording findings. Anyone whose bug reports get returned with "when was this, and on which page?" Private by design Everything happens on your computer. No accounts, no uploads, no tracking, no analytics. The only network request this extension can make is checking your license key with Gumroad when you activate. Exported PDFs end with one small grey line crediting ProofStamp — it is how most people find it. It contains nothing traceable, and licensed users can switch it off in Settings. Permissions, in plain English "Read the page you're on when you click" (activeTab/scripting) — used only to show the selection overlay and capture your chosen region. "Downloads" saves your file. "Storage" remembers your settings locally. Free trial, one-time price Your first 3 captures are free with every feature. Unlocking forever costs $7.99 once — no subscription, no account. License keys are delivered instantly by Gumroad. What it doesn't do (on purpose) No full-page scrolling capture, no cloud sync, no editing suite, no legal chain-of-custody claims. One job, done extremely well. Support: onceworks.tools@gmail.com — I answer fast. FAQ Q: Does it work offline? A: Yes — capture and PDF creation are fully local. Q: Where are files saved? A: Your Downloads folder. Q: New computer? A: Paste the same license key from your Gumroad receipt. Q: Can I remove the ProofStamp line from the PDF? A: Yes — Settings, once licensed. Q: Is this legally admissible evidence? A: No. It timestamps and labels what you captured; it makes no chain-of-custody claim.
Details
- Version1.1.0
- UpdatedSeptember 7, 2026
- FeaturesOffers in-app purchases
- Offered byOnceWorks Tools
- Size29.0KiB
- LanguagesEnglish
- DeveloperArindam Das
Flat-3E, Live Gagan, 2148 Nayabad Main Road Kolkata, West Bengal 700099 INEmail
onceworks.tools@gmail.comPhone
+91 95827 19113 - TraderThis developer has identified itself as a trader per the definition from the European Union and committed to only offer products or services that comply with EU laws.
Privacy
This developer declares that your data is
- Not being sold to third parties, outside of the approved use cases
- Not being used or transferred for purposes that are unrelated to the item's core functionality
- Not being used or transferred to determine creditworthiness or for lending purposes
Support
For help with questions, suggestions, or problems, visit the developer's support site
