Sign a PDF for free. Privately.
Draw your signature with a mouse, finger or stylus, then place it anywhere on the page. Add the date or your printed name too. Your document never leaves your device.
- 100% private files never leave your browser
- No signup and no watermarks
- Fast nothing to upload or wait for
Free tools
- Sign PDFDraw your signature and place it
- Fill & add textType on forms and tick boxes
- Merge PDFCombine PDFs and images
- Organize pagesRotate, delete and reorder
- Split PDFExtract pages or split into files
- Redact PDFRemove private information
- Compress PDFMake a PDF smaller
- JPG to PDFTurn photos into a PDF
- Compress & convert imagesJPG, PNG and WebP
- HEIC to JPGConvert iPhone photos
How it works
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1
Open your PDF
Click Choose a PDF or drop the file here. The signature pad opens straight away.
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2
Draw and place
Draw your signature and click Add signature. Drag it into place and resize it with the corner handle. Use Text to add the date.
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3
Download
Click Download to save the signed copy. Your original file stays unchanged.
Sign documents without uploading them
Leases, contracts, permission slips, invoices: most documents only need a quick signature. Many signing websites upload your document to their servers first. AcornDoc doesn’t. The PDF is opened, signed and saved entirely inside your browser, so nobody else ever sees it.
Need to initial several pages? Click Sign again to add another signature, or draw small initials and place one on each page.
Can I sign on my phone?
Yes. Draw your signature with your finger, then drag it into place. A stylus works too.
Is a drawn signature legally valid?
A drawn signature is an electronic signature. Electronic signatures are widely accepted for everyday agreements, but some documents (such as wills or certain government forms) need a handwritten or certified signature. If you’re unsure, ask whoever requested your signature.
Is this a certified digital signature?
No. Your signature is added to the page as an image, like signing on paper. It doesn’t use a digital certificate, which some organizations require.
What you can do
Add text
Click anywhere and type. Your text automatically matches the size, color and boldness of nearby text. Change it anytime, including bold with B.
Tick boxes
Mark checkboxes and radio buttons with a tick, cross, dot or circle. Click a mark again to remove it.
Sign
Draw your signature with a mouse, finger or stylus, then place and resize it anywhere.
Draw
Freehand pen in any color and thickness, for notes and initials. Drag the corner to scale a drawing.
Lines & shapes
Draw straight lines, arrows, rectangles and circles. Hold Shift to snap angles. Drag the ends or corners to resize.
Measure
Set the drawing's scale (like 1/4" = 1' or 1:100), or calibrate from a known length, then drag to measure real distances. Calibrating is best for scanned drawings.
Highlight
Drag over text to highlight it, just like a marker pen.
White-out
Cover mistakes or old content, then type over it. The cover automatically matches the page's background color.
Add images
Insert logos, stamps or photos (PNG, JPG, WebP, GIF). Photo location data is removed automatically.
Organize pages
Drag thumbnails to reorder pages, and rotate or delete any page.
Merge PDFs & images
Combine PDFs and photos into one file with + Add files, or drop more files into the editor.
Redact
Black out account numbers, addresses or anything private. Unlike white-out, it's removed from the file for good.
Tips & limits
A few things worth knowing before you start.
Hiding private details? Use Redact, not white-out. White-out only covers text: it's still inside the file and can be copied or found by search. Redact removes it for good by saving that page as an image.
- Download before you close the tab. Nothing is stored on our servers, for your privacy, so your work exists only in this browser tab until you download it.
- Existing text can’t be retyped. Cover old words with white-out and type the new ones on top.
- Fillable form fields stay empty. Your answers are drawn on top, so they look right on screen and on paper, but form software won’t read them as filled in.
- Locked PDFs need unlocking first. Password-protected or restricted files can’t be opened.
- Added text uses Latin letters. English, Spanish, French and similar work. Other alphabets (for example Chinese, Arabic, Hindi, Punjabi) and emoji show as “?”.
- No Word, Excel or scanned-text conversion. To make a file smaller, use Compress PDF.
Keyboard shortcuts
- V
- Select
- T
- Text
- M
- Mark (tick)
- L
- Lines & shapes
- R
- Measure
- D
- Draw
- Shift + drag
- Snap angle / square / circle
- H
- Highlight
- W
- White-out
- X
- Redact
- Del
- Delete selected
- ←→↑↓
- Nudge (hold Shift for 10×)
- Ctrl+Z
- Undo
- Ctrl+Y
- Redo
- Ctrl+B
- Bold / unbold text
- Ctrl+S
- Download
- + −
- Zoom in / out
- Esc
- Finish typing / back to Select
Questions
Are my files uploaded anywhere?
No. Your PDF is opened, edited and saved entirely inside your browser. It never reaches our servers, and we can't see it.
Is it really free?
Yes. There's no account, no trial, no page limit and no watermark on your files.
Will my original file be changed?
No. Download saves a new copy (named “…-edited.pdf”). The original file on your device is never touched.
How do I edit text that's already in the PDF?
Use White-out to cover the old words, then use Text to type the new ones on top. Remember that the covered text is hidden, not deleted.
How do I change or remove something I added?
Choose Select (or press V), click the item, then drag to move it (even onto another page), drag the round corner handle to resize, or press Delete. Undo works too.
Does it work on my phone?
Yes, in up-to-date Chrome, Safari, Edge and Firefox. Tap the panel icon in the toolbar to see your pages. Detailed edits are easier on a larger screen.
Why does some of my text show as “?”
Added text currently supports Latin letters only (English, Spanish, French, German and similar). Support for more alphabets is planned.
How big can my file be?
Up to 200 MB. Everything happens on your device, so very large files may be slow on older phones.
Will links and form fields in my PDF still work?
Yes, in most cases. If you rotate a page and add something to it, links and form fields on that page are removed. Redacted pages are saved as images, so their links and text selection go too.
How accurate are measurements?
As accurate as the drawing’s scale. Scanned or resized drawings may not match their printed scale, so calibrate against a dimension you know and double-check critical lengths.