Guides

Every MammothPDF tool works in your browser: your files stay on your device. Each tool has a guide that walks through its functions step by step, with screenshots - pick one by category, or search for it.

Organize & Manage

Merge PDF
Combine multiple PDFs into one file
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Split PDF
Split a PDF into several smaller files
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Rotate PDF
Rotate selected pages by any angle
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Flip PDF (Mirror Pages)
Mirror PDF pages horizontally or vertically
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Straighten PDF (Deskew)
Fix crooked scans - detect each page's tilt and level it
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Auto-rotate PDF
Turn sideways and upside-down pages upright - detected page by page
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Delete Pages
Remove unwanted pages from a PDF
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Resize PDF pages
Put every page on A4, Letter, A3 or a custom sheet, or scale the content - vector stays sharp
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Reorder Pages
Drag and drop to rearrange PDF pages
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Reverse Pages
Flip the page order of a PDF
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Extract Pages
Extract selected pages from one or more PDFs
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Crop PDF
Trim margins or cut a PDF's pages to a rectangle
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N-up (Multiple Pages per Sheet)
Put 2, 4, 6, 8, 9 or 16 PDF pages on one sheet, or fold a booklet
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Edit & Annotate

Edit PDF
Correct the text that's there, or add text, images, shapes and highlights
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Sign PDF
Add your signature to a PDF
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Fill PDF forms
Type into an existing PDF form
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Create fillable PDF
Turn a PDF into a fillable form: add text fields, check boxes, radio buttons, drop-downs and lists, or change the fields it already has. Free, in your browser.
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Add Watermark
Stamp text or image watermarks onto pages
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Page Numbers
Add page numbers to any PDF
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Bates Numbering
Stamp sequential Bates numbers across a set of PDFs
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Edit PDF metadata
Change or remove a PDF's title, author, subject, keywords and dates - written so every viewer agrees
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Flatten PDF
Burn form fields, comments, highlights and stamps into the page - or strip them - so what you see is what everyone gets
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Compare PDFs
Compare two PDF versions - the words that changed and the areas that look different, page by page
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Optimize & repair

Compress PDF
Make a PDF smaller
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Linearize PDF
Fast Web View: the first page shows while the rest still downloads
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Sanitize PDF
Remove hidden data: metadata, attachments, embedded video, scripts, comments, thumbnails
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Repair PDF
Fix a damaged PDF that won't open
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Inspect PDF
What is in the file, what makes it big, and which tool would help
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Remove blank pages from PDF
Find and delete the empty pages a duplex scan leaves behind - checked before you save
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Remove duplicate pages from PDF
Find and delete the pages that repeat an earlier one - a sheet scanned twice, an attachment merged in again - checked before you save
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Secure

Redact PDF
Remove text and pictures for good
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Protect PDF
Password-protect a PDF
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Unlock PDF
Remove a password or restrictions from a PDF
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Verify PDF Signature
Check whether a PDF's digital signatures are intact and who signed it
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Digitally Sign PDF
Sign a PDF with your certificate (.p12, .pfx) in your browser, nothing uploaded
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Convert

Image to PDF
Turn JPG, PNG, WebP and other images into a PDF
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PDF to Image
Save PDF pages as JPG, PNG or WebP images
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Extract Images
Pull every picture out of a PDF as JPG or PNG files
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Convert PDF to grayscale
Turn a colour PDF black-and-white for printing - text stays text, images go grey, nothing is rasterised
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OCR - make a PDF searchable
Recognise the text of a scanned PDF in the browser and add a searchable, selectable text layer - the scan itself is untouched
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PDF to Text
Extract the text of a PDF into a plain .txt file, page by page
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PDF to Word
Convert a PDF to an editable Word document (.docx) that keeps the layout
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PDF to Excel
Convert the tables of a PDF to an Excel workbook (.xlsx), numbers as numbers
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PDF to PowerPoint
Convert a PDF to an editable PowerPoint (.pptx) - every page a slide, the text where it was
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Word to PDF
Convert a Word document (.docx) to PDF - text, tables, pictures, headers and footers
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Excel to PDF
Convert an Excel workbook (.xlsx) to PDF - every sheet paged as Excel prints it
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PowerPoint to PDF
Convert a PowerPoint presentation (.pptx) to PDF - one page per slide
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