About PDF Dark Mode
We built PDF Dark Mode because reading PDFs on a bright white screen — especially at night or for long stretches — is genuinely uncomfortable. Most PDF readers don't have a proper dark mode, and the workarounds are either too complicated or don't work reliably. We wanted something simple that just works.
What We Do
PDF Dark Mode is a free, browser-based tool with two core features:
- PDF Dark Mode Reader — Upload a PDF and read it instantly in dark mode. Choose from Warm, Classic, Blue, or Green themes. No file is uploaded to any server; everything is processed locally in your browser.
- Invert PDF Colors — Convert a PDF to dark mode permanently and download the new file. Useful when you want to share a dark version or read it offline in any PDF app.
Our Principles
Privacy first
Your PDF files never leave your device. All processing happens locally in your browser using client-side JavaScript. We do not store, read, or transmit your documents. For full details, see our Privacy Policy.
No account required
You don't need to sign up, log in, or provide an email address. Open the site, upload your PDF, and you're done.
Free to use
Both the reader and the converter are completely free. No subscription, no paywalls.
Works on any device
PDF Dark Mode works in modern browsers on desktop, tablet, and mobile — no app download or installation needed.
Why We Built This
Many people read PDFs for work, study, or personal projects — textbooks, research papers, technical documentation, e-books. Long reading sessions on a bright white background cause eye strain, especially in low-light environments.
Existing solutions were either unreliable (browser extensions that don't affect PDF rendering) or required installing software. We built a straightforward web-based alternative that anyone can use immediately, without friction.
Get in Touch
Have a question, found a bug, or want to share feedback? We'd love to hear from you. Visit our Contact page or email us at [email protected].