Version1.45.0
Revision30
Size143.2 MB
LicenseLGPL-3.0+
Confinementstrict
Basecore22

Free, open-source PDF annotation editor

ScreenshotScreenshotScreenshot

Open PDF Studio is a free, open-source PDF editor and annotator built for professionals who need powerful tools without expensive subscriptions.

Features:

- 22+ annotation tools: highlight, underline, strikethrough, shapes, freehand drawing, text boxes, callouts, sticky notes, stamps, and images
- Signatures: draw, save, and reuse up to 5 signatures
- Measurement tools: distance, area, and perimeter with scale calibration
- Page management: insert, delete, extract, reorder, replace, and merge PDFs
- Watermarks and headers/footers with variables
- Redaction: mark and apply to permanently remove sensitive content
- Full print dialog with live preview, scaling, and page setup
- Form filling: AcroForms and XFA with JavaScript validation
- Edit existing PDF text
- Export pages as PNG, JPEG, or raster PDF
- Multi-tab editing with session restore
- 10 navigation panels: thumbnails, bookmarks, annotations, attachments, signatures, layers, form fields, destinations, links, and tags
- XFDF annotation import/export
- 5 themes: Dark, Light, Blue, High Contrast, System
- Undo/redo with up to 100 levels
- Built-in auto-updater
- No telemetry, no data collection, no subscriptions

Built with Tauri and web technologies for a fast, lightweight, native desktop experience.

Update History

1.43.0 (29)1.45.0 (30)
23 Apr 2026, 16:30 UTC
1.36.0 (28)1.43.0 (29)
7 Apr 2026, 16:45 UTC
1.35.0 (27)1.36.0 (28)
30 Mar 2026, 14:29 UTC
1.34.0 (26)1.35.0 (27)
25 Mar 2026, 14:01 UTC

Published17 Feb 2026, 08:58 UTC

Last updated23 Apr 2026, 16:23 UTC

First seen17 Feb 2026, 09:01 UTC