CMAKnowledge PDF Toolbox – 24 Free Online PDF Tools
CMAKnowledge PDF Toolbox
24 powerful PDF tools — merge, organize, sign, redact, watermark, compress, batch process and more.
🔒 Everything runs in your browser. Files are never uploaded to any server.
Merge PDFs
Combine two or more PDF files into a single PDF, in the order you select them.
Organize PDF New
See every page as a thumbnail, reorder pages, delete unwanted ones, then save.
Use ◀ ▶ to reorder and 🗑 to remove a page before saving.
Extract Pages
Pull out any pages or ranges into a brand-new PDF, e.g.
1-3,5,8-9.Rotate PDF
Rotate every page by 90°/180°/270°.
JPG to PDF
Convert one or more JPG/PNG images into a single PDF.
PDF to JPG Preview
Preview and save the first page of a PDF as an image.
Right-click the image above to save.
Extract PDF Text
Copy all text content from your PDF (all pages).
Sign PDF New
Draw your signature with mouse or finger and stamp it onto any page.
Add Page Numbers New
Stamp "Page X of Y" onto every page of your PDF.
Add Watermark
Add translucent watermark text on every PDF page.
Edit PDF Info New
View and update the title, author, subject and keywords stored in a PDF.
Unlock PDF (Simple)
Remove password if file is not strongly encrypted.
Strong encryption/DRM is not supported client-side.
Protect PDF
Password-protect your PDF.
Not supported client-side
Not supported client-side
Please use a server or trusted service for PDF encryption.
Redact PDF New
Load a page, draw black boxes over sensitive text, then save.
Click and drag on the page image to mark an area to redact.
Compress PDF (Lite)
Shrink PDF file size – removes metadata only, keeps original quality.
For scanned/image-heavy PDFs, try Advanced Compress below for much bigger savings.
Advanced Compress New
Re-renders each page as an optimized image — big savings on scanned PDFs.
Large PDFs may take a little longer since every page is redrawn in your browser.
PDF Info & Word Count New
Get page count, file size, title/author and total word count at a glance.
Compare PDFs New
Check page-by-page text similarity between two versions of a document.
Repair PDF New
Attempt to fix a corrupted or malformed PDF by reloading and resaving it.
Crop PDF New
Trim margins from every page by a fixed amount (in points — 72pt = 1 inch).
Grayscale PDF New
Convert every page to black & white — handy for cheaper printing.
Batch Processing New
Run one operation across many PDFs at once and download everything as a ZIP.
Split into Batches New
Break one large PDF into multiple smaller PDFs of N pages each, zipped together.
PDF Pages to Images New
Export every page of a PDF as a separate image, zipped together.
