100% Browser-Based · No Signup Required
Free Resources
Free tools that run entirely in your browser, plus the open source libraries behind them. Generate invisible watermarks, verify watermark integrity, or sign and watermark PDFs in one flow.
Open Source
Open source resources
1Bridge is build on Open Source packages. Audit the code or use them in your own projects.
Watermarking
@drvillo/browser-watermark
Applies invisible and visible watermarks to images and PDFs in the browser, then verifies them from the same payload.
View on GitHubSigning
@drvillo/react-browser-e-signing
React components and helpers for placing fields and signing PDFs entirely on the client.
View on GitHubEncryption
@drvillo/webcrypto-seal
Sealed-box encryption built on WebCrypto with Argon2id key derivation for client-side confidentiality.
View on GitHub