Geliştirici araçları.

Small, single-purpose tools for your daily development workflow. Runs in the browser, no data is sent to any server.

🔧 PDF signature checker

Select a PDF file (read in your browser via FileReader) and detect whether it contains a digital signature: the signature dictionary (/Sig, /ByteRange, /Filter, /SubFilter) and metadata such as signer/date/reason/location are parsed and shown. IMPORTANT: this tool only shows the PRESENCE of a signature and its metadata; CRYPTOGRAPHIC VALIDITY (the mathematical signature, certificate chain, document integrity) is NOT verified. No network; the file never leaves your device.