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Firmalo
Sign PDFs online free, no signup or watermark
Firmalo lets you sign PDF documents online for free, without creating an account and without adding a watermark. The key difference is privacy: files are processed locally in the browser, so the PDF never leaves your device. It works on desktop and mobile, supports Spanish and Portuguese, and is built for fast everyday PDF signing rather than complex contract workflows.
Top comment
I built Firmalo because signing a simple PDF online is still weirdly annoying: many tools ask for registration, add watermarks, push paid plans, or upload your document to a server. The goal was to make the fastest possible PDF signing flow for everyday use: - open the site - upload a PDF - add your signature - download the signed file No signup, no watermark, and the file stays in your browser instead of being uploaded. I started with Spanish and Portuguese because PDF signing is a common task across LATAM and Brazil, and many existing tools either feel too heavy or are not localized well enough. Firmalo is not trying to replace full e-signature platforms like DocuSign for certified signatures or legal workflows. It is for the simple case: “I just need to sign this PDF now.”
About Firmalo on Product Hunt
“Sign PDFs online free, no signup or watermark”
Firmalo was submitted on Product Hunt and earned 5 upvotes and 2 comments, placing #113 on the daily leaderboard. Firmalo lets you sign PDF documents online for free, without creating an account and without adding a watermark. The key difference is privacy: files are processed locally in the browser, so the PDF never leaves your device. It works on desktop and mobile, supports Spanish and Portuguese, and is built for fast everyday PDF signing rather than complex contract workflows.
On the analytics side, Firmalo competes within Productivity, SaaS and Privacy — topics that collectively have 709.8k followers on Product Hunt. The dashboard above tracks how Firmalo performed against the three products that launched closest to it on the same day.
Who hunted Firmalo?
Firmalo was hunted by Kirill Sirenko. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Firmalo including community comment highlights and product details, visit the product overview.