Free PDF tools · optional license
Merge, split, edit and convert PDFs in your browser.
Free tools · optional commercial license
16kstars—30 daysAGPL-3.0
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Document Editors
Platform information checked 2026-10-17. PDF4QT is free MIT-licensed desktop software for Windows and Linux, with optional sponsorship and no required hosted processing or model API. It can replace common Acrobat annotation, form-filling, page-organization and comparison tasks; complete Acrobat feature compatibility is not promised. Third-party components retain their own licenses. Current source is MIT after the 2025 relicensing, although the older project website still says LGPL. OCR in current source is optional and is not promised in every packaged release.
Official app downloads and supported devicesRead, annotate, fill, compare and rearrange PDF documents with a local Windows and Linux toolkit.
PDF4QT is free MIT-licensed desktop software for Windows and Linux, with optional sponsorship and no required hosted processing or model API. It can replace common Acrobat annotation, form-filling, page-organization and comparison tasks; complete Acrobat feature compatibility is not promised. Third-party components retain their own licenses. Current source is MIT after the 2025 relicensing, although the older project website still says LGPL. OCR in current source is optional and is not promised in every packaged release.
Check official pricingRead, annotate, fill, compare and rearrange PDF documents with a local Windows and Linux toolkit. Visit the project website to check the currently available deployment options.
Official public installation packages and provider setup documentation are available. Availability was source-checked; the application was not installed or executed by AltStack.
Availability checked 17 Oct 2026. Check the provider’s release or installation information
PDF4QT is free MIT-licensed desktop software for Windows and Linux, with optional sponsorship and no required hosted processing or model API. It can replace common Acrobat annotation, form-filling, page-organization and comparison tasks; complete Acrobat feature compatibility is not promised. Third-party components retain their own licenses. Current source is MIT after the 2025 relicensing, although the older project website still says LGPL. OCR in current source is optional and is not promised in every packaged release.
Technologies recorded in the catalog snapshot.
Merge, split, edit and convert PDFs in your browser.
Free tools · optional commercial license
Handwrite notes, draw diagrams and annotate PDF files with a desktop app.
Free desktop notes · optional LaTeX setup
CryptPadProduct logo · See the interface on the official websiteSecure collaboration with end-to-end encryption.
We have not checked this tool’s current pricing. Visit its official website before choosing a plan.
Complete office suite for documents, spreadsheets & more.
We have not checked this tool’s current pricing. Visit its official website before choosing a plan.
PDF ArrangerProduct logo · See the interface on the official websiteMerge, split, rotate and reorder PDF pages on your computer.
Free local PDF pages · selected Acrobat tasks
Scan documents and save searchable PDFs on your computer.
NAPS2 is GPL-2.0-or-later software, free for individuals and businesses with no ads or software restrictions. Scanning needs a supported scanner and drivers; OCR language files must be downloaded. No OCR API subscription or hosted service is included or required for this local workflow. Hardware and storage are your own costs.
