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Downloads
New here? Follow the step-by-step setup guide — install, activate your license, get your USB token recognised and make your first signature.
Download the latest OneSigner tools and utilities.
OneSignerBridge (free)
Free for everyone, no license or account needed: lets your browser sign PDFs with your own USB token. Try it at onesign.sg/sign.
OneSignerBridge (browser + USB token helper)
Small helper that lets your browser sign with your own USB token / smart card (needs .NET 8 Desktop Runtime). Version 1.1.0: when you enter the token PIN on the signing page, it signs through the token's own PKCS#11 module, so Viettel-CA, VNPT-CA, FastCA and similar tokens no longer pop up their PIN window. Works in Chrome 141+ (own TLS certificate, HTTPS command channel). Signed by One Sign Pte. Ltd.
Small helper that lets your browser sign with your own USB token / smart card (needs .NET 8 Desktop Runtime). Version 1.1.0: when you enter the token PIN on the signing page, it signs through the token's own PKCS#11 module, so Viettel-CA, VNPT-CA, FastCA and similar tokens no longer pop up their PIN window. Works in Chrome 141+ (own TLS certificate, HTTPS command channel). Signed by One Sign Pte. Ltd.
2026.10.10 · windows · 0.8 MB
OneSigner Service + GUI
Automated PDF & Code Signing Windows Service
OneSigner Setup (Free Trial)
OneSigner Service + Config GUI installer with the eSign portal. New in 2026.10.11: (1) Start the free 30-day trial inside the app: enter your email, confirm the emailed code, and the trial key is issued for this computer and applied at once (no website account needed). (2) PDF signing profiles get a Timestamp server field (filled in from your CA) and an LTV option that embeds the OCSP/CRL revocation data, so Adobe Acrobat shows the signature as valid long-term. (3) Browser signing (Sign visually, eSign with your own token): signatures now validate in Adobe Acrobat (fixes "Expected a dict object"). Includes everything from 2026.10.10. 30-day free trial. Signed by One Sign Pte. Ltd. Installer shows the End User License Agreement and requires acceptance; existing appsettings.json is never overwritten on upgrade.
OneSigner Service + Config GUI installer with the eSign portal. New in 2026.10.11: (1) Start the free 30-day trial inside the app: enter your email, confirm the emailed code, and the trial key is issued for this computer and applied at once (no website account needed). (2) PDF signing profiles get a Timestamp server field (filled in from your CA) and an LTV option that embeds the OCSP/CRL revocation data, so Adobe Acrobat shows the signature as valid long-term. (3) Browser signing (Sign visually, eSign with your own token): signatures now validate in Adobe Acrobat (fixes "Expected a dict object"). Includes everything from 2026.10.10. 30-day free trial. Signed by One Sign Pte. Ltd. Installer shows the End User License Agreement and requires acceptance; existing appsettings.json is never overwritten on upgrade.
2026.10.11 · windows · 143 MB
OneSignTool CLI
Remote Code Signing Tool (AzureSignTool compatible)
OneSignTool CLI
Remote code-signing CLI (AzureSignTool-compatible). Signed by One Sign Pte. Ltd.
Remote code-signing CLI (AzureSignTool-compatible). Signed by One Sign Pte. Ltd.
2.1.0 · windows · 67.5 MB