Who should use Tbook?

Tbook is an open-source project built for language learners.

Does Tbook have a free plan?

Yes — Tbook is open source under the Open Source license and free to use.

What platforms does Tbook run on?

Tbook runs on the web, the command line, and Android. It can also be self-hosted.

Is Tbook still active?

The GitHub repository shows 53 commits in the last 90 days.

What projects are similar to Tbook?

Similar projects tracked by PulseGate include EfficiencyNext Data Connector, System Information Widgets, and CKB.

Tbook is developed by tbook.dev.

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Tbook

Name: Tbook
Author: tbook.dev

tbook.devInfrastructure

.tbook is an open ebook format that pairs original text with sentence-by-sentence translations and precomputed word-level alignments. Tapping any word instantly shows its meaning within the full sentence translation, all without requiring a network connection. The format is simple (ZIP + JSON) and includes a demo reader, specification, and tools for creating .tbook files. It is aimed at people learning new languages through immersion reading.

Open SourceWebCLIAndroidSelf-hosted

Visit tbook.dev

10stars

1fork

5features

2026since

Overview

5 features

Tbook sits in PulseGate's Developer Tools category. It focuses on reading books in a foreign language without constant dictionary lookups or internet access. Tbook is an open-source project aimed at language learners. Tbook is open source under the Open Source license. It runs on the web, the command line, and Android, and it can be self-hosted.

Behind Tbook is tbook.dev, and it first shipped in 2026. The project is developed in the open on GitHub with 10 stars and 53 commits in the last 90 days. Key capabilities include tap-to-translate, word-level alignment, and offline-first.

Summary written by a language model from the project’s public pages.

Tap-to-translate
Word-level alignment
Offline-first
Sentence translations
ZIP + JSON format

Built with & integrations

Framework

SvelteKit

Runs on

BrowserCLIAndroidSelf-hosted

Detected from

SvelteKit: data-sveltekit- in the HTML · /_app/immutable/ in the HTML

Trust & compliance

License

Open Source

Verified signals

HTTPSOpen Source GitHub · ★ 10Active maintenance

Indexing history

What PulseGate has recorded for this listing

Indexed3 Aug · 19:16 UTC
Show HN: Open-source book format for instant translations and Android app verified against its public source
Source: PulseGate · Open

Frequently asked questions about Tbook

What does Tbook do?: Tbook focuses on reading books in a foreign language without constant dictionary lookups or internet access. It is catalogued under Developer Tools on PulseGate.
Who should use Tbook?: Tbook is an open-source project built for language learners.
Does Tbook have a free plan?: Yes — Tbook is open source under the Open Source license and free to use.
What platforms does Tbook run on?: Tbook runs on the web, the command line, and Android. It can also be self-hosted.
Is Tbook still active?: The GitHub repository shows 53 commits in the last 90 days.
What projects are similar to Tbook?: Similar projects tracked by PulseGate include EfficiencyNext Data Connector, System Information Widgets, and CKB.EfficiencyNext Data Connector System Information Widgets CKB
Who makes Tbook?: Tbook is developed by tbook.dev.
How long has Tbook been around?: Tbook first shipped in 2026.

At a glance

Platforms: Cli · Web
Languages: English
Open source: Yes · ★ 10
License: Open Source
First seen: 3 Aug 2026
Built for: language learners
Model: Open source
Solves: Reading books in a foreign language without constant dictionary lookups or internet access.

Registered as

GitHub: adubovskoy/tbook_converter

Developer

tbook.dev

Small team

GitHub

Open source

View on GitHub

Stars: 10
Forks: 1
Open issues: 0
Last commit: 30 Jul 2026
Commits 90d: 53
Contributors: 3
Authorship: Small team
Default branch: master

Live coverage

Identity confidence: Medium · 68.8
Indexed: 3 Aug 2026
Lifecycle: Alive
First seen: Aug 2026
Last seen: 3 Aug 2026

Identity audit (13)

Slug: show-hn-open-source-book-format-for-instant-translations-and-tbook-dev
Lifecycle state recorded: 3 Aug 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 3 Aug 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Name from: Derived from the project's own page and URL.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 3 Aug 2026
Canonical URL: https://tbook.dev/

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