PDF Coord Marker

About

PDF Coord Marker helps developers, designers, and document reviewers mark rectangular regions on PDF pages and work with precise coordinates — without uploading your files to any server.

Everything runs locally in your browser using PDF.js. Your PDF never leaves your device.


WHAT YOU CAN DO
• Upload a PDF and open the built-in viewer
• Enter Bottom Left / Top Right coordinates (PDF point units, bottom-left origin)
• Drag on the PDF to select a region — coordinates fill in automatically
• Paste coordinates from JSON or other tool output
• Add visual box markers, navigate pages, and zoom
• Export annotated PNG or PDF
• Switch UI language: English or 中文


WHO IT'S FOR
• Developers integrating PDF extraction or layout tools
• QA teams verifying document regions
• Anyone who needs repeatable, shareable coordinate data from PDFs


FREE vs PRO
Free (always available):
• Unlimited PDF marking and viewing
• Core coordinate tools and exports
• Exports include a small corner watermark

Pro — one-time lifetime license ($9.90 via Gumroad, no subscription):
• Watermark-free exports
• Batch import (multiple regions at once)
• Fine-tune offsets
• Custom box styles (color, stroke, fill)
• Copy coordinates to clipboard
• HD export quality
• No ads

Purchase Pro on Gumroad, then activate with your purchase email and license key in the extension popup or Settings page.


PRIVACY FIRST
• PDF parsing and marking happen entirely on your device
• No PDF content is sent to our servers
• License verification contacts Gumroad’s API only when you activate Pro
• Settings and license status are stored locally in Chrome (chrome.storage.local)
• Temporary PDF data uses IndexedDB and is cleared when you start a new session


PERMISSIONS (why we need them)
• storage — save preferences and Pro license status
• downloads — save exported PNG/PDF files
• tabs — open Gumroad checkout in a new tab when you choose to upgrade

Free users may see an optional sponsored Amazon affiliate banner. Pro removes all ads.


SUPPORT
Questions or license issues: [email protected]