# JakubMelka/PDF4QT

Open source PDF editor.

Repository: https://github.com/JakubMelka/PDF4QT
Canonical: https://ross.abutalabs.com/products/pdf4qt
Homepage: https://jakubmelka.github.io/
Language: C++
License: MIT
License Family: permissive
Topics: pdf, pdf-viewer, pdf-editor
Last push: 2026-08-22T15:05:14+00:00

## Health v2 (maintenance only)
Score: 87/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 64, longevity 100
- inputs: {"age_days": 2619, "days_push": 11, "days_rel": 80, "gap_med": 133.5, "n_releases_24m": 5}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1459, forks 140 (observed 2026-08-28T04:04:47.268938+00:00)

## What it is
PDF4QT is an open-source PDF editor, viewer, and rendering library written in C++ with Qt, implementing PDF 2.0 functionality. It ships a C++ library, several GUI applications, and a command-line tool for viewing, editing, signing, and manipulating PDF documents.

## Use cases
- edit pdf documents
- view pdf files on windows and linux
- fill and sign pdf forms electronically
- convert pdf to audiobook with text to speech
- compare two pdf documents
- manipulate pdf pages from the command line
- inspect internal pdf structure
- compress and optimize pdf files

## When to choose
- you need a free alternative to commercial PDF editors
- you want a C++ PDF rendering library to embed in your own application
- you need PDF signing, encryption, or form filling on Windows or Linux
- you want scriptable PDF processing via a command-line tool

## When to avoid
- you need full XFA form support (only simple readonly static XFA is supported)
- you need a web-based or mobile PDF solution
- you require PDF 2.0 completeness as it is still a work in progress

## Facets
- artifact type: application
- maturity: active
- function: pdf, pdf-viewer, gui, cli, cryptography, ocr
- domain: pdf, desktop-applications, files, cross-platform
- platform: windows, cpp
- tags: pdf-editor, pdf-rendering, pdf-library, digital-signatures, form-filling, qt, linux

## Member repositories
- JakubMelka/PDF4QT (main) score 87

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:47.268938+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:35:25.995634+00:00, confidence not recorded.
  - readme: https://github.com/JakubMelka/PDF4QT (fetched 2026-08-28T04:04:47.268938+00:00, sha 73bcf2fd79b4)
  - homepage: https://jakubmelka.github.io/ (fetched 2026-08-29T11:44:09.815912+00:00, sha 05bb3b28e87e)
- Data as of 2026-08-30T08:39:29.467469+00:00.