PDF guides Choose a guide for practical steps, a worked example and the checks to make before you share the result. Each guide links to the tools it uses.
Before you start Keep the original file and work on a copy. Check the downloaded result rather than assuming every part of the source was kept or removed. For how each tool works, see the PDF editor user guide .
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Related guides How to check that your PDF is not uploaded See for yourself that RedactNinja PDF works on your device: watch the browser Network panel, read the security policy and try a tool offline.
How to make a PDF smaller for email Get a PDF under an email attachment limit: compress it with a preset or a target size, or split it into parts below a set size. Runs in your browser.
How to remove hidden data from a PDF before sending it Find and remove PDF metadata, attached files, scripts, comments, covered text and hidden layers before you share a file. Step by step, in your browser.
How to combine scanned pages into one PDF Turn scanned pages or phone photos into one tidy PDF: combine the images, straighten the pages, add searchable text with OCR and keep the file size down.
How to sign a PDF without printing it Draw or upload your signature, place it on a PDF and download the signed copy, all in your browser. Plus when to use a certificate signature instead.
How to password protect a PDF Add an open password to a PDF in your browser with 256-bit AES encryption. Step by step, with tips on choosing the password and sending it separately.
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