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PDF Dark

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United States HQFounded 2026

Deployment

Web-basediPhone/iPadAndroid

Overview

About PDF Dark

PDF Dark turns any PDF into a real dark-mode file you can download, share, and reread anywhere. The entire conversion happens in your browser - your file never touches a server, verifiable in DevTools. A saturation-based algorithm preserves photos and charts in their original colors while darkening the rest. Output is a standard PDF (not a viewer toggle), so it stays dark on Kindle, iPad, Acrobat, anywhere. Free, MIT-licensed, no signup, no ads.

At a glance

Software information

Industries served, licensing and the support PDF Dark provides.

Industries

  • Education-management
  • Research

Licensing

  • Open Source
  • Free version

Support

  • Email
  • Support daysMondayTuesdayWednesdayThursdayFridaySupport time09:00 to 18:00 (CTT)

Training

  • Documentation

Knowledge Base

Languages (1)
English
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Capabilities

PDF Dark features

The full feature set, grouped by module.

PDF

  • Convert to PDF
  • PDF Reader

Plans

PDF Dark pricing

Free Version
Yes
PDF Dark is completely free with no paid tiers, no signup, and no ads. The project is open source under the MIT license.
Vendor pricing page

Media

Screenshots & video

PDF Dark screenshot