Prevent tampering. Our browser-based drag-and-drop tool locks dynamic checkboxes and form fields into static PDF elements in real-time.
Built for confidential workflows — files stay in your browser memory.
Stop sending contracts that can be altered after signing. Securing interactive PDFs is easy with our local flattening tool. It parses form dictionaries and locks interactive fields into flat layouts seamlessly. It disables input fields, flattens checkboxes, and preserves signature layers flawlessly. The entire lock routine executes locally in your browser sandbox, delivering a robust, hyper-fast, private file locker.
Select the contract or invoice form you want to seal.
The script flattens all form elements and removes dynamic field lists locally.
Download the finalized, tamper-proof document directly.
| Feature Metric | Traditional Cloud Services | GoLocalPDF Sandbox |
|---|---|---|
| Tamper Protection | ❌ Disables inputs, which can be re-enabled by editors | ✅ Converts fields into permanent vector shapes |
| Data Control | ❌ Sends document forms to cloud conversion queues | 🛡️ 100% Client-side. Files never leave your PC |
| Image Quality | ❌ Rasterizes layout layers, making text blurry | ✅ Keeps vector elements sharp and scalable |
| Batch Speed | ❌ Slow queues on third-party server networks | ⚡ Instant local processing in milliseconds |
Yes, it merges forms and signatures into the base page layer, ensuring text layers cannot be edited.
Yes. The script runs entirely inside your local browser memory, allowing you to lock tax forms with zero upload risks.
Absolutely. All locking and rendering routines run locally in your browser memory sandbox, keeping your documents private.
