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PDF24

Free ad-funded PDF toolkit online, plus a free offline Windows Creator app.

Operated by geek Software GmbH

Visit PDF24

Opens the vendor's own site.

Jobs covered

Open a task to see exactly what the vendor documentation supports.

Merge Browse all merge tools

merging PDFs with PDF24, where the Merge PDF tool documents combining multiple PDFs, images, Word documents and other supported files into a single PDF, with drag-and-drop ordering, an optional page mode, bookmarks and blank pages, files transferred over SSL to servers in Germany and deleted after one hour, and free use without registration; the page's without-losing-quality wording is recorded as marketing rather than a lossless guarantee, and the scope makes no claim about preserving signatures, forms or annotations across a merge

Compress Browse all compress tools

compressing PDFs with PDF24, where the Compress PDF tool documents shrinking files by reducing image resolution and image quality and removing unneeded data, with adjustable DPI and image-quality percentage and additional removal options, with files uploaded over SSL to servers in Germany and deleted after one hour and free use without registration; the scope records the documented adjustable compression and makes no lossless or specific size-reduction guarantee

Edit Browse all edit tools

editing PDFs with PDF24, where the Edit PDF tool documents writing on PDF pages, inserting images, rectangles, circles and arrows, and freehand sketching with the mouse, then downloading the changed PDF, and its own tip suggests converting a PDF to Word to edit the text; the scope records adding new marks, images and shapes and freehand drawing, makes no claim to rewrite existing page text, and keeps the web upload and one-hour deletion facts

Convert Browse all convert tools

converting common Office and image files to PDF and converting PDFs back to editable DOCX and other formats in PDF24's online PDF Converter, where the conversion is done on PDF24 servers; not a claim about every format in the wider PDF24 tool set

Sign Browse all sign tools

signing PDFs with PDF24, where the Sign PDF tool documents electronically signing contracts, applications and forms without a printer or scanner by drawing, uploading or photographing a signature and placing it on the PDF, with free use without registration and files deleted after one hour; the page describes an electronic signature only and does not document a certificate-based digital signature, certificate authority, trust validation or timestamping, so the scope makes no cryptographic-signature or legal-validity claim

OCR Browse all ocr tools

running OCR with PDF24, where the PDF OCR tool documents making scanned documents and photos searchable with text recognition, copying text from them and saving as PDF/A with deskewed and cleaned pages, and provides a long language selector; the scope records the searchable-text and PDF/A output workflow and the language selector, and makes no accuracy figure, language-count guarantee or handwriting claim

Protect Browse all protect tools

protecting PDFs with PDF24, where the Protect PDF tool documents encrypting PDF files with a password at AES-256 bits and restricting permissions such as printing, copying content, commenting or changing the document, with free use without registration and files deleted after one hour; the scope records the documented AES-256 encryption and permission restrictions and makes no claim that other readers enforce the permission flags, with redaction kept separate

Where your files are processed

Mixed - depends on version and feature

The vendor's own documentation separates them. On the device: PDF24 Creator for Windows. On their servers: The online tools. A single answer for the whole product would be wrong for one of them.

This verdict is for the online tools, which PDF24's own pages say run in the cloud on their servers, with files stored for about an hour.

The separate PDF24 Creator for Windows works offline and explicitly does not upload files. It has the opposite processing model from the online tools.

What it does

PDF24 comes in two parts: free browser tools covering merge, split, compress, edit, sign, OCR, conversion and password protection.

The online tools are funded by advertising and run on servers in Germany. PDF24 says uploaded files and results are usually deleted about one hour after upload or creation.

PDF24 Creator is a free Windows application, currently version 11.31.1. It adds a virtual PDF printer, a reader and offline batch processing.

Files stay on the user's own PC.

No paid tier, subscription or forced premium version was found, and no account is required.

Best for

Anyone who wants capable PDF tools at no cost and without an account, especially Windows users who want an offline virtual PDF printer.

Worth knowing

The online tools upload documents to PDF24's servers in Germany. The privacy policy says uploads and results are usually deleted after about one hour, with no backups.

It names an exception for optional AI recognition of invoice data.

PDF24 Creator works offline on Windows. There is no macOS or Linux version, and it is currently version 11.31.1.

No paid tier or subscription was found. The services are funded by advertising, with an optional AI feature.

Editing means adding writing, images, shapes and freehand drawing, not rewriting existing page text.

Signing is an electronic signature, not a certificate-based digital signature. Password protection uses AES-256 and can set permissions, but the pages do not establish that every reader enforces them.

OCR produces searchable output and PDF/A with deskewing and cleaning. No accuracy figure is published.

Redaction is a separate tool.

Details, and where each comes from

Vendor statements, our own reading of their pages, and the things nobody has established yet, each answered separately. Where we have not confirmed something it says so rather than guessing, and a row nobody has established is greyed out.

Versions covered
Web · Windows
Website
pdf24.org
Requires an account
No
Watermark on the free tier
No
Maximum file size
Not verified
Batch processing
Yes
Data residency
European Union
Open source
Not verified
Self-hostable
No
Licence
Freeware, proprietary.

Freeware, proprietary. PDF24 is a project of geek Software GmbH, Einstein Palais, Friedrichstrasse 171, 10117 Berlin, registered at Berlin-Charlottenburg under HRB 100865 B, VAT ID DE248847214, with Benjamin Bohlmann as managing director.

The online services are provided free of charge and funded by advertising; the legal notice says the services currently offered free of charge will remain free of charge in the future, and the tool pages state there are no subscription traps or forced premium versions. PDF24 Creator is free Windows software for private and business use.

No open-source licence or published source distribution was found, so the product is recorded as proprietary freeware; the online Terms of Use (as of 8 October 2026) expressly exclude PDF24 Fax and PDF24 Creator from their scope, and no paid tier was found on the pages read.

Redaction
Removes the content
Programmatic access
None
Last availability check
Responded in 271 ms 21 October 2026

Checked automatically by our own runner, not reported by the vendor. 100% of our last 30 checks got a response.

What the redaction verdict rests on

From the vendor's own documentation, read 22 September 2026. Not tested by us.

“Black out confidential text and images with a pen or shapes, pages are rasterized on saving so hidden content is removed for good and cannot be restored”

What that does not establish

The vendor’s own tool page, not a test we ran. Stating the mechanism is the useful part: the pages are RASTERIZED on saving, so the hidden content is gone - and so is the rest of that page’s text layer, which is the same cost as SnackPDF, one of the tools we did test.

PDF24 also documents a separate "Erase or white out" feature in its help centre; that is a different operation and is not covered by this verdict. The tool is cloud-based, so the file is uploaded before it is redacted.

https://tools.pdf24.org/en/redact-pdf

Sponsorship is distribution, not an endorsement or a promise of search rankings, AI citations, traffic, or sales. This listing is a free entry, compiled from published sources.

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Related reading

How this record was put together

Editorial review.
No editor has signed this record off. That is not the same as nothing having been checked, and the lines below say what has.
Source reading.
No vendor page has been read for this record yet.
Website availability.
The vendor's site was last checked on 21 October 2026.
Behaviour testing.
We have not run this tool ourselves, so everything here rests on the vendors’ own pages.

Sources: pdf24.org; pdf24.org privacy policy; tools.pdf24.org compress and Creator pages. Vendor claims, not independently verified.

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