Enlyzr

mdReader

Markdown, notebooks and code, read like a book

mdReader is a reader for technical documents. It turns Markdown, Jupyter notebooks, AsciiDoc, reStructuredText, Org-mode, Djot, CSV tables and source files into clean pages you can read like a book: code is coloured, formulas are typeset, diagrams are drawn. It works offline, with no account and no ads. E-books in EPUB and FictionBook open in the same reader.

Coming soon to Google PlayUser guidePrivacy policy

For Android 13 and newer. Free, with no ads and nothing to buy.

A Markdown document shown as a page in mdReader: a heading, a paragraph with inline code, a Kotlin listing coloured by language and a typeset formula, with page 1 of 4 and the reading time left at the bottom.
  • 12
    kinds of document in one reader, from Markdown and notebooks to EPUB books
  • 10
    colour themes for the page, and eight fonts
  • 9
    reading profiles built in, from Daytime to Tired Eyes
  • 4
    highlight colours, each with a name of your own

What is in the app

  • Markdown as clean pages

    Tables, task lists, footnotes, wiki links and front matter, with code blocks coloured by language. What was a file full of marks becomes a page you can read.

  • Formulas, diagrams and smart blocks

    TeX formulas are typeset with KaTeX and Mermaid diagrams are drawn: flowcharts, sequence, class and more. Callouts, bar charts, metrics and progress bars are written as simple ::: blocks. All of it is drawn on the device, offline.

  • Notebooks and other formats

    Jupyter notebooks show their Markdown cells, their code and its outputs; nothing is run. AsciiDoc, reStructuredText, Org-mode and Djot look the way Markdown does. CSV and TSV files become tables, source and configuration files coloured listings, and web pages are read as documents, without scripts.

  • E-books too

    EPUB and FictionBook books open with their cover, contents, pictures and footnotes, and get the same reading modes, highlights, notes and read-aloud as every other document.

  • Book mode and comfort

    Real pages with the time left shown, or scrolling, and a two-page spread on tablets in landscape. Ten colour themes, eight fonts and nine reading profiles, with day and night switching by the clock. Eye care adds dimming, a blue-light filter and break reminders.

  • Read aloud

    Listen with the voices on your device, at 0.75x to 2x speed with a sleep timer. Reading goes on with the screen off, controlled from a media notification.

  • Highlights, notes and review cards

    Mark text in four colours, add notes and export them as Markdown. Highlights and question blocks become spaced-repetition cards that come back after longer and longer gaps.

  • Edit, and see what changed

    Edit Markdown in place, block by block or as source, with find and replace, and tick task boxes while you read. When a document was edited since you last read it, mdReader marks what is new or changed and compares the two versions.

  • Library and Knowledge Base

    Point mdReader at a folder and browse it as a list, a grid with book covers or a folder tree, with search in names and contents, tags, favourites and links between documents. The Knowledge Base gathers the key ideas, warnings, charts and highlights of all your documents in one place.

A look at the app

  • A Markdown document called Token bucket rate limiter as a page: a paragraph with inline code, a Kotlin class in a code block coloured by language, and a formula typeset on its own line. Page 1 of 4, about 2 minutes left.
    Markdown with code and a formula, as a page
  • The next page of the same document: a Mermaid flowchart that branches at the question Token left? into Yes and No, and under it a table of plans with their rate, burst and answer over the limit.
    A Mermaid flowchart and a table
  • A page headed Benchmark with three smart blocks: a metric card showing 0.8 ms with a change of minus 35 percent, a bar chart of requests per second by threads, and an insight card with a short note.
    Metric, chart and insight blocks
  • A Jupyter notebook called Latency analysis as a page: a text cell, a Python code cell coloured by language, its saved output, and a formula under the heading How it scales.
    A Jupyter notebook: code, output and a formula
  • The Library as a list: a Markdown document read to 44 percent, a completed Jupyter notebook, the book Pride and Prejudice with its cover at 62 percent, a completed note and The Adventures of Sherlock Holmes, each with buttons for tags, delete and favourite.
    The Library: documents and books side by side
  • The toolbar open over a page in a dark theme, with the buttons Home, Back, Raw, Search, TOC, Files, Listen, Bookmark, Bookmarks, Analysis, Insights, Info, Display, Edit, Print, Default, Settings and Help; below it a bar chart and a table of stations.
    The toolbar, over a page in a dark theme
  • The first page of Alice's Adventures in Wonderland as an e-book, with three passages highlighted in yellow, green and pink. Page 8 of 168, about 1 hour 47 minutes left.
    An e-book page with three highlights
  • The next page of the same e-book: the end of a paragraph and John Tenniel's drawing of the White Rabbit looking at its watch, filling most of the page.
    An e-book page with its illustration

Good to know

  • Only Markdown can be edited; the other formats are read-only.
  • Books locked by DRM cannot be opened. PDF, Kindle and office files are not supported.
  • No account, no ads, no analytics. Your documents and reading data stay on your device.
  • The app goes online only to load pictures that a document links to, and you can switch that off.
  • The interface is in English and Czech.
  • It runs on Android 13 and newer.

Questions and answers

Which files does mdReader open?

Markdown, plain text, source and configuration files, CSV and TSV tables, Jupyter notebooks, AsciiDoc, reStructuredText, Org-mode, Djot, web pages, and EPUB and FictionBook books. It does not open PDF files, Kindle books, office documents or books locked by DRM.

Does it run the code in a notebook?

No. A Jupyter notebook is shown as a document: its Markdown cells, its code and the outputs saved in it. Nothing is run, and scripts in an output are never executed.

Can I edit documents?

Yes, Markdown files can be edited in the app. The other formats are read-only. A file is changed only when you tap Save, tick a task or delete it.

Does it need an internet connection or an account?

No. mdReader works offline, with no account and no server of its own, and your documents and reading data stay on your device. Formulas and diagrams are drawn on the device. The only network use is loading remote pictures that a document links to, which you can turn off in Settings.

How does it keep my devices in step?

Turn on Carry reading data in the Library folder. Each device writes a small file into your Library folder, and a sync app or cloud folder that already carries the folder carries those files too. Your place, highlights and bookmarks then match on every device. The app itself sends nothing.

Why does it ask for notification permission?

Only for the media notification that controls reading aloud when it continues in the background. You can switch Background listening off in Settings.

Which languages does the interface have?

English and Czech. It follows the language of your phone, or you choose one in Settings.

What does it cost?

Nothing. mdReader is free. There is nothing to buy in the app, no subscription and no advertisements.

Coming to Google Play

mdReader is not listed on Google Play yet. This page will carry the link as soon as it is.

Coming soon to Google Play

Questions or feedback: enlyzr@gmail.com