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YumeBytesYumeBytes

Dream in Bytes. Build with Purpose.

Desktop software for Windows, macOS and Linux.

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Products

Apps you can download today.

PDFBook

A desktop app for reading and organizing PDFs.

  • Windows
  • macOS
  • Linux

Runs on Windows, macOS and Linux. Keep the PDFs already on your computer arranged like a bookshelf and open them in a reader built for focus. Your files stay on your machine — nothing is uploaded.

  • Read in flip or scroll mode
  • A floating window you can keep on top of other apps
  • Sort your library by tag, author or reading status
  • Free to start — a few features need a paid plan

Free to start, with Pro and a one-time Lifetime plan. Details on the product site.

View on pdfbook.app（opens in a new tab）

More apps will follow over time.

Platforms

Whichever OS you're on, it's the same app, working the same way.

Your files and data stay on your computer. You don't have to hand them to the cloud to use the app.

  • Windows
  • macOS
  • Linux

Languages

The apps are translated into 14 languages: English, Spanish, French, German, Italian, Portuguese, Polish, Russian, Turkish, Chinese, Japanese, Korean, Indonesian and Vietnamese.

It's just nicer to use software in the language you already think in.

  • English
  • Español
  • Français
  • Deutsch
  • Italiano
  • Português
  • Polski
  • Русский
  • Türkçe
  • 中文
  • 日本語
  • 한국어
  • Indonesia
  • Tiếng Việt

Privacy

We keep data to the bare minimum, and your personal information is never sold or disclosed to third parties.

Wherever possible, everything stays on your own device. Your data is yours.

  • No third parties
  • Minimal data
  • Stays on device

YumeBytes is a small product studio based in Japan. Its apps are designed so that, wherever possible, your data stays entirely on your own device — privacy comes first.

Some tools handle a minimal amount of data in order to provide their features. Even then, we collect no more than necessary, with transparency and your control as priorities.

The priority is software that is hard to break and lasts for years, rather than constantly adding new features.

See the legal disclosure

How they're made

I'd rather keep an app easy to use than chase a long list of features.

What matters to me is that an app still runs fine years after it was made.

  • Stays on your device
  • One-time option
  • No lock-in
  • Built to last

Send an email and I'll reply within 2–3 business days.

contact@yumebytes.com