Qudo PDF Toolbox
The offline PDF editor that never sends your files anywhere
A desktop PDF toolkit with 21 tools for merging, splitting, organizing, cropping, compressing, encrypting, redacting, annotating, watermarking, filling and signing, editing content, extracting text and images, cleaning metadata, and exporting to Word or Excel. Everything runs on your machine.
v1.0.0 · QudoPDF.exe · ~130 MB · Windows 10/11 · Free & open source (AGPL-3.0)
Two ways to use Qudo PDF
In your browser
- No install: open a tool and it runs in the tab
- Great for quick one-off jobs on any device
- Files are processed locally in the browser too
On your desktop
- One .exe for Windows, works fully offline
- True content editing: move, re-type and resize elements
- Batch and heavy documents without browser limits
Why Qudo PDF Toolbox
Everything runs on your machine
Files never leave your computer. No uploads, no server, no telemetry, which makes it suitable for contracts, financial records and anything confidential.
A real editor, not just converters
Insert text and images as floating elements you can drag and resize, edit existing text inline on the page, move text blocks and images, and redact sensitive data permanently.
Reader-grade viewer
Continuous scrolling with background rendering, a bookmark outline panel, a uniform thumbnail grid, zoom and fit controls, plus undo and redo with atomic saves.
Bilingual interface
Switch between English and Simplified Chinese at runtime from Help to Settings, with no restart required.
Single-file distribution
One QudoPDF.exe of about 130 MB. No installer and no dependencies to manage: download it and run it.
21 tools in one window
Everything from the web version plus a true content editor, all offline.
Viewer
Continuous scroll viewer
Background async rendering with zoom in and out, fit width and fit page.
Outline and pages panel
Bookmark tree with click-to-jump and scroll highlighting, plus a uniform thumbnail grid with multi-select and odd, even or range selection.
Undo, redo and atomic save
Snapshot-based undo and redo, an unsaved-changes marker, and safe temp-file-plus-replace saving.
Pages
Merge PDF
Combine files in order with optional per-file page ranges.
Split PDF
By ranges, every N pages, per page, N equal parts, odd or even, or extract a selection; optional ZIP output.
Organize Pages
Drag to reorder, rotate, duplicate, delete, insert blank pages or pages from other PDFs, and extract a selection.
Rotate Pages
Left, right or 180 degrees, applied to selected pages or the whole document.
Crop and Trim Margins
Automatic white-margin removal or manual four-side crop with unit conversion.
Images to PDF
Set page size, orientation, margins, background color and per-image rotation.
PDF to Images
Export JPG, PNG or WebP with DPI presets, quality, max width and background options.
Create Blank PDF
New documents with paper size, orientation, page count and background color, ready to edit and save.
Convert
PDF to Word
Editable DOCX with tables, plain-text reflow, or layout-faithful page images.
PDF to Excel
Ruled-line and alignment table detection, an editable cell grid, XLSX or CSV export, and three sheet layouts.
Extract & Privacy
Extract Text
Per-page browsing with in-result search and cleanup options; export TXT, Markdown, JSON or HTML.
Extract Images
Embedded image list with filters, dedupe and preview; region crop-box export; optional ZIP with a report.
Clean Metadata
Inspect and strip Info, XMP, attachments, JavaScript, fonts and form fields with 16 switches and an exportable cleaning report.
Edit
Watermark
Text or logo, 9-grid position, tiling with stagger, rotation, opacity and margins; CJK-capable.
Page Numbers
9 numbering formats plus custom template placeholders, odd and even mirrored layout, six header and footer zones.
Edit Content
Insert text and images as draggable, resizable floating elements; inline on-page text editing; delete regions; replace or delete images; move existing text and images.
Fill & Sign
Text, dates, symbols, initials, a handwritten signature pad, typed or uploaded signature; form-field detection and filling.
Annotate
Highlight, underline, strikeout, ink, free text, sticky note, stamp, rectangle, circle, line, arrow and image as real PDF annotations with a properties panel.
Redact
Area select, snap-to-text-line, keyword search and sensitive-data regexes for email, phone, national ID, bank card, IP, URL, date, passport and license plate; permanent removal with optional full-page rasterization.
Security & Size
Compress
Four levels from lossless restructure to extreme rasterize, plus grayscale, metadata removal, embedded-file removal and linearize.
Encrypt
AES-256, AES-128 or RC4 with an open password and eight permission flags for print, modify, copy, annotate, fill forms, accessibility and assemble.
Unlock
Batch decryption with single or per-file passwords, an authorization checkbox and digital-signature warnings.
Get Qudo PDF Toolbox
Download the single-file executable and run it. No installer, no account, and nothing ever leaves your machine.
Download for Windowsv1.0.0 · QudoPDF.exe · ~130 MB · Windows 10/11 · Free & open source (AGPL-3.0)
System requirements
- Windows 10 or Windows 11
- No installation required: a single .exe file
- About 130 MB download
- System Chinese fonts are used for signatures and the font picker
Prefer to run from source? The project is open source on GitHub under AGPL-3.0. Install Python 3.10 or newer, run pip install -r requirements.txt, then python run.py. You can package your own exe with PyInstaller.
Frequently asked questions
Is Qudo PDF Toolbox free?
Yes. It is free and open source under AGPL-3.0. The single QudoPDF.exe costs nothing and has no ads, no account and no usage limits.
Does it upload my files anywhere?
No. Every operation runs locally on your computer. There is no server, no upload and no telemetry, which is exactly what makes it suitable for confidential documents.
Which operating systems are supported?
Windows 10 and Windows 11. The app ships as a single Windows executable; macOS and Linux are not currently supported.
Can it read scanned PDFs with OCR?
Not yet. Scanned documents need OCR before text extraction or editable Word export. Image-based pages can still be viewed, merged, cropped, compressed, watermarked and annotated.
What can the content editor actually do?
Insert text and images as floating elements you can drag and resize, edit existing page text inline, move existing text blocks and images, delete regions, and replace or delete images. Inserted elements can be resized; existing page content can be moved and re-typed but not resized.
Why is the license AGPL?
The app builds on PyMuPDF and pdf2docx, which are AGPL-3.0, so the project is AGPL-3.0 as well. Closed-source commercial distribution would require a commercial PyMuPDF license from Artifex.
License
Qudo PDF Toolbox is released under AGPL-3.0 because it depends on PyMuPDF (AGPL-3.0) and pdf2docx (AGPL-3.0). Other dependencies include PySide6 (LGPL), openpyxl, python-docx and Pillow (MIT), and numpy (BSD).
Known limitations
- No OCR: scanned documents need OCR before text extraction or editable Word export.
- Existing page content can be moved, re-typed and deleted, but not resized or rotated; floating elements can be resized.
- Edited or inserted text is rewritten with standard or system fonts, so glyph details may differ from the original embedded font.
- Vector graphics such as lines and shapes cannot yet be moved as a whole.
Get Qudo PDF Toolbox
Download the single-file executable and run it. No installer, no account, and nothing ever leaves your machine.
Download for Windowsv1.0.0 · QudoPDF.exe · ~130 MB · Windows 10/11 · Free & open source (AGPL-3.0)