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SignDesk for Gmail – Sign, stamp & edit attachments

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ExtensionTools18 users
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Overview

Sign, stamp, date, edit, redact and merge PDF, Word and Excel attachments in Gmail. Your files never leave your browser.

Sign, stamp and edit the PDF, Word and Excel attachments you receive in Gmail, then send them back on the same email thread, without printing, scanning or downloading anything. SignDesk adds a small toolbar to every attachment in Gmail. Open a contract, purchase order, invoice, quotation or form, place your signature, company stamp and date exactly where they belong, and attach the signed file to your reply in one click. WHAT YOU CAN DO • Sign PDF and Word documents with your own handwritten signature • Add your company or office stamp, and the date, anywhere on the page • Sign Excel files directly on the sheet • Edit Word and Excel files: change text, numbers and names; Excel totals recalculate automatically • Merge, split, reorder and rotate PDF pages, for example to combine an invoice, delivery note and waybill into one file • Preview attachments without downloading them • Keep files in the SignDesk tray and attach them to any other email • Save the finished file straight back to your Gmail reply, or download it HOW TO USE 1. Install SignDesk and open Gmail. 2. The first time, upload a photo of your signature (and your stamp, if you use one). SignDesk cleans up the background for you. 3. Confirm your email address with the 6-digit code SignDesk emails you. 4. On any attachment, click Sign, Stamp or Edit. 5. Click where your signature, stamp or date should go, adjust if needed, then click "Save & attach to Gmail reply". PRIVATE BY DESIGN Your documents, attachments, emails, signature and stamp are processed only inside your own browser. They are never uploaded to SignDesk or anyone else. SignDesk's server only checks your email address and plan. PLANS • 14-day free trial, no card needed, with every feature • Standard: ₦1,000 per month for one person (up to 3 computers), or ₦800 per user per month for organisations • Pro (full package, adds the conversion tools on signdesk.ng): ₦1,500 per month for one person, or ₦1,200 per user per month for organisations Organisations: staff join automatically with their company email, and the admin can add vendors and partners by email. Pay securely by card or bank transfer. There are no automatic charges; you renew when you choose. PERMISSIONS EXPLAINED • "Read and change your data on mail.google.com": needed to show the SignDesk buttons next to your attachments and to attach the signed file to your reply. SignDesk only acts on the attachment you click. • Access to Gmail's attachment server: needed to open the attachment you chose to sign or edit. SUPPORT Email support@signdesk.ng or visit https://signdesk.ng Version 3.2.0: email confirmation to protect your plan, Standard and Pro plans. Gmail is a trademark of Google LLC. SignDesk is not made by or affiliated with Google.

Details

  • Version
    3.5.0
  • Updated
    November 3, 2026
  • Features
    Offers in-app purchases
  • Size
    1.08MiB
  • Languages
    English
  • Developer
    Chibuikem Ubani
    15 CHEZCOAN, Maiduguri Metro, Borno State. Maiduguri, Borno 600282 NG
    Website
    Email
    Support@signdesk.ng
    Phone
    +234 816 770 9118
  • Trader
    This developer has identified itself as a trader per the definition from the European Union and committed to only offer products or services that comply with EU laws.

Privacy

Manage extensions and learn how they're being used in your organization

SignDesk for Gmail – Sign, stamp & edit attachments has disclosed the following information regarding the collection and usage of your data. More detailed information can be found in the developer's privacy policy.

SignDesk for Gmail – Sign, stamp & edit attachments handles the following:

Personally identifiable information
Authentication information

This developer declares that your data is

  • Not being sold to third parties, outside of the approved use cases
  • Not being used or transferred for purposes that are unrelated to the item's core functionality
  • Not being used or transferred to determine creditworthiness or for lending purposes

Support

For help with questions, suggestions, or problems, please open this page on your desktop browser

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