4PDFs
An ELAI Ecosystem participant
All tools

21 PDF tools. Every one cryptographically signed.

Free for everyday use — 5 operations per day. Need more? Day Pass for one big job or 4PDFs Pro for unlimited.

No signup required to try any tool

Organize

Rearrange, combine, and structure pages
⊕
Merge PDF
Combine multiple PDFs into a single document.
⊟
Split PDF
Break a PDF into individual pages or page ranges.
⊞
Combine Pages
Lay multiple pages onto one — 2-up, 4-up, custom.
↻
Rotate PDF
Rotate pages 90°, 180°, 270° — by page or all.
⊡
Crop PDF
Trim margins or crop pages to a custom size.
#
Page Numbers
Add numbering with position, format, and start value.

Convert

In and out of PDF format
→
Word → PDF
Convert .docx files to PDF with formatting preserved.
→
Excel → PDF
Convert .xlsx workbooks to PDF.
→
JPG → PDF
Bundle one or more images into a single PDF.
←
PDF → Word
Extract a PDF into an editable .docx file.
←
PDF → Excel
Pull tables out of PDFs into .xlsx.
←
PDF → JPG
Export each PDF page as a JPG image.

Optimize & Protect

Compress, secure, recover
▤
Compress PDF
Shrink file size while keeping quality usable.
🔒
Protect PDF
Add a password to restrict opening.
🔓
Unlock PDF
Remove the password on a PDF you own.
⌨
OCR
Make scanned PDFs searchable and copyable.
◫
Watermark
Add a text or image watermark to every page.

Sign & Verify ELAI

Cryptographic provenance — anyone can verify, forever
✓
Sign PDF
ELAI-sign a PDF with cryptographic provenance.
✓✓
Batch Sign
Sign multiple PDFs in one operation.
✎
Fill & Sign
Fill a form, sign it, ELAI-stamp the result.
⌕
Verify Signature
Check the ELAI signature on any signed PDF.
Free

Heavy user? Skip the daily cap.

4PDFs Pro is $9.99/mo — unlimited operations, unlimited signatures, batch processing, custom branding.

See plans →