Offline AI Translation Tools

CTranslate2 is an inference library for developers who want to run Transformer models on their own hardware or servers. It focuses on reducing execution time and memory use for applications built in C++ or Python.

Wordflow is an AI writing assistant for writers and researchers who want to reuse editing prompts across their work. Its browser editor lets you revise a paragraph or selected passage with a choice of local and external models.

Stella is a legal workspace for law firms and legal teams that want matter files, contract review and research in one place. Its AI agent answers questions about a matter with citations that open the relevant source passage.

Phorminx turns speech into text in Windows apps and keeps a searchable record of meetings. It's for people who want dictation, translated transcripts and answers about a call without sending the conversation to a cloud AI service.

AIdea for Zotero is an AI assistant for researchers who want to ask questions about papers and translate reading material inside Zotero. Its side panel works in the library view and the PDF or EPUB reader.

Memo AI turns audio and video into transcripts, translated subtitles and notes for people reviewing interviews, meetings or podcasts. Speech recognition works offline, and speaker identification runs locally.

Sokuji translates speech for people taking part in meetings across languages. Other participants hear your translated voice as ordinary call audio, so they don't need to install anything.

SoniTranslate is an AI video dubbing app for people translating spoken videos into other languages. It can run locally, with a Gradio interface in the browser.

SmartSub helps video creators subtitle recordings and dub them into other languages. You can use its transcription, translation, proofreading, dubbing and export tools separately or combine them for batch processing.

ESPnet is a speech AI toolkit for researchers and developers who want to run pretrained models on their own hardware or train speech systems. Its recipes cover data preparation through evaluation, with published results for comparison.

ChatGPTBox is a browser extension for people who want AI help while reading pages or searching the web. It connects to self-hosted models or services such as ChatGPT, Claude, Moonshot and Azure.

pyVideoTrans translates spoken video into another language for people preparing subtitles and dubbed versions. It works from the audio, so footage doesn't need existing subtitles.

ARIA turns audio playing on a Windows PC into live subtitles for videos, games, browser playback and calls. It's for people who need captions across apps or want translations alongside the original speech.

Lingarr translates subtitle files into a chosen language for people maintaining a media library. It automates translation and lets you choose between local backends and hosted services.

RSSBox helps people follow foreign-language news through translated RSS feeds. It combines translation, article filtering and daily digests for readers who want to manage multiple sources in one self-hosted service.

Aiko turns recorded meetings, lectures and voice memos into text for people who want to keep their audio on their own device. It processes completed recordings rather than live speech and doesn't identify individual speakers.

Google AI Edge Gallery is a local AI app for people who want to use and compare generative models on their own devices. Model inference runs on-device, including offline chat and media tasks.

LibreTranslate is a machine translation service for developers and organizations that want translation to run on their own server. Its API connects translation to applications, while a web interface lets people translate directly.

Buzz turns speech into transcripts and subtitles on your computer. It's for people working with recordings or providing live captions who want offline transcription and translation into English.

Linguist is a browser translation extension for people reading, communicating or studying across languages. You can choose on-device translation or connect a translation service that suits your needs.

Translate Books With LLMs translates books, documents and subtitles using a local or cloud model. It's for readers and translators working with long texts who need formatting and terminology to carry through the translation.

Tolmach translates complete books for readers and translators who need consistent terminology across chapters. It uses local LLMs through Ollama, with optional Ollama Cloud models.

WhisperIME converts speech to text on Android for people who want offline dictation in their keyboard or a standalone transcription app. It uses Whisper for recognition on the device.

WhisperLive turns speech into text as audio arrives, using OpenAI's Whisper models. It's for developers and teams who want to run transcription on their own machine or server and connect it to live audio or recorded files.

AIGNE DocSmith is a locally run AI documentation generator for developers and teams turning project material into guides and reference documents. The Node.js app stores its workspace and generated files locally, but generation requires Anthropic or another LLM provider configuration. Requests to a remote provider send project context to that service; local installation doesn't mean offline inference.

Talk DAT! is a free, open-source dictation app for people who want to turn speech into formatted writing across their desktop apps. It runs on Windows 10 and 11 and Apple silicon Macs with macOS 14 or later. Downloaded models let it work offline without an account, keeping speech and text on your computer.

Immersive Translate is a translation extension for people reading foreign-language articles, research and work documents. It keeps the original text beside the translation so readers can compare passages.

RTranslator helps people hold spoken conversations in different languages using their Android phones. It runs translation locally and works offline.

Dictate Keyboard is a voice keyboard for people who prefer speaking to typing in Android apps. It builds on FlorisBoard and lets you choose where speech recognition happens.

GameStringer translates games for players and fan translators who want a language the game doesn't include. It detects the engine, extracts text and applies translated text to the game, with compatibility depending on the engine and title.

subgen creates subtitles from audio and video for personal media libraries. It's useful for films and shows that lack usable subtitles, with automatic generation tied to your media server.

ebook2audiobook converts non-DRM ebooks into narrated audio with chapters and metadata. It's for readers who want audio editions of legally acquired books, with a choice of speech engines and narrator voices.

Offline Translator is an Android app for translating material when you don't have an internet connection or want translation to stay on your device. It handles everyday text as well as images and PDF/ODT documents.

Whisper Local is a free, MIT-licensed dictation app for Windows and macOS, aimed at people who want voice typing without cloud processing. It's an alternative to Wispr Flow and Dragon that inserts speech into the active text field, including in chat apps, browsers and code editors. It doesn't require an account or API key.