Summary
To sign a PDF without printing, open YAMP Sign PDF, upload your document, and choose how you want to sign: draw with your finger or mouse, type your name using elegant cursive fonts, or upload a photo of your paper signature (the white background is removed automatically). Choose black or blue ink, place it on the page, and download your finished PDF in seconds.
The trouble with printing, signing, and scanning
Signing everyday paperwork should not take half an hour or depend on an office printer. Printing multiple pages, tracking down a pen, signing, taking smartphone photos, and fighting crooked corners or shadows degrades document sharpness and creates huge files that fail to send over email.
Signing digitally saves time and preserves pristine text quality, keeping your documents looking clean and professional.
Is signing a PDF legally valid?
Yes. Across most countries, electronic signatures hold the exact same legal weight as handwritten pen signatures for rental agreements, employment contracts, scopes of work, and everyday commercial transactions.
International law enforces the principle of technological neutrality: courts cannot reject a document or deny its legal validity simply because it was signed electronically.
European Union (eIDAS art. 25)
The eIDAS regulation clearly specifies that an electronic signature shall not be denied legal effect or admissibility in court solely because it is in digital format.
United States (ESIGN & UETA)
The federal ESIGN Act ensures that no contract, record, or signature may be invalidated simply because it was generated or executed electronically.
Latin America & Global
Statutes such as Mexico's Commercial Code, Peru's Law 27269, and Colombia's Law 527 grant full legal backing and evidentiary weight to electronic signatures.
The few exceptions are transactions specifically requiring in-person notarization by law, such as real estate deed transfers or formal wills. For practically everything else, electronic signing is fully binding.
How the security seal works (SHA-256 hash)
How do you prove nobody altered the agreement after you signed it? When signing in YAMP, you can enable an optional audit certificate with a cryptographic SHA-256 hash.
This hash is a unique mathematical fingerprint computed from the exact content of the file. If someone attempts to modify even a single comma, digit, or word afterward, the hash changes completely, exposing any tampering immediately.
Three ways to sign in YAMP
The tool lets you choose the method that best fits your workflow, plus black or institutional blue ink:
Draw with your finger or mouse
Smooth touch and mouse drawing canvas with quick reset to capture your natural signature on phones, tablets, or computers.
Type your name with cursive calligraphy
Type your name to instantly generate a formal, stylized digital signature in cursive or serif typography.
Upload a photo of your paper signature
Sign a blank piece of paper and snap a photo. YAMP automatically wipes out the paper background and shadows, keeping only clean, transparent ink strokes.
Steps to sign your PDF
- 1
Upload your PDF file
Drag your document into the tool or pick it from your device storage.
- 2
Create or add your signature
Choose to draw, type, or upload an image. Pick between black or formal blue ink.
- 3
Position it on the page
Drag your signature to the designated line and resize it to match the layout. Place it on multiple pages if needed.
- 4
Download the finished document
Click 'Finish and Download' to save your signed PDF instantly, with an optional SHA-256 audit page.
YAMP vs. DocuSign and Adobe Sign
Services like DocuSign or Adobe charge $15 to $40 every month for basic signing and force you into entering credit card details. With YAMP, you sign for free, require no signup, and keep your files private inside your own browser.
| Feature | YAMP | DocuSign / Adobe |
|---|---|---|
| Price | Free | $15 to $40 / month |
| Mandatory signup | Not required | Credit card required |
| Black or blue ink choice | Included | Black only by default |
| Paper background removal | Automatic | Not supported |
| SHA-256 hash certificate | Included (optional) | Enterprise tiers only |
| Document privacy | Processed in browser | Stored on their servers |