Convert & translate audio to text
Translate video audio to text online and transcribe MP3, WAV, M4A to TXT/SRT in Vietnamese, English, Español, 日本語, Français, or 中文. Extract and translate subtitles free — 100% local AI in your browser.
Drop an audio file here to transcribe
MP3, WAV, M4A, AAC — translate & transcribe 100% in your browser
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How to transcribe and translate audio
Drop or select an audio file — MP3, WAV, M4A, or AAC. Choose your target output language from the dropdown: Tiếng Việt, English, Español, 日本語, Français, 中文, or Auto-detect.
SnapKit decodes audio with the Web Audio API, auto-detects the source language, then runs Whisper-Tiny (@xenova/transformers) with task translate when needed. For non-English targets, Opus-MT ONNX models translate each segment while preserving timestamps for accurate SRT export.
The progress bar shows two clear stages: Decoding file and AI translating & transcribing. Copy text, download .txt, or export .srt subtitles aligned to the original audio timing.
Extract and translate subtitles free with zero server upload. Everything runs 100% locally inside your browser for absolute privacy.
Why choose SnapKit? Our tools are 100% Private, No Server Upload, Instant Browser-Based, with No File Size Limit — plus free ringtone and video makers. Whether you merge PDFs, convert HEIC photos, or trim MP4 clips, your files stay on your device with zero cloud storage.
Why choose SnapKit?
Every tool is built around four promises: privacy, speed, freedom, and accessibility. No cloud pipeline — just your browser and your files.
100% Private — No Server Upload
Files are processed on your device with client-side WebAssembly and Canvas. No bytes are sent to our servers.
Instant Browser-Based speed
Skip slow uploads and downloads. Your CPU and GPU do the work locally for near-instant results.
No File Size Limit — Free forever
No registration walls, no watermarks, and no arbitrary caps. Use ringtone, video, PDF, and image tools freely.
Works on every device
iPhone, Android, Windows, and Mac browsers are all supported with the same private, instant experience.
Frequently asked questions
Can I translate an English video into Vietnamese subtitles?
Yes. Select Tiếng Việt as the target language. Whisper AI auto-detects English speech, transcribes it securely in your browser, then Opus-MT translates each segment to Vietnamese while keeping SRT timestamps aligned with the original audio — no server upload, accurate and private.
How do I translate video audio to text online for free?
Upload your audio file, pick a target language, and click Transcribe to text. The progress bar shows decoding and AI translation stages. Download TXT or SRT when finished — all processing runs locally with Whisper and ONNX WebAssembly.
Which output languages are supported?
English, Tiếng Việt, Español, 日本語, Français, and 中文. Source language is auto-detected. Whisper handles speech-to-text and English translation; Opus-MT translates to other targets while preserving subtitle timing.
Can I download translated subtitles with timestamps?
Yes. Click Download SRT after processing. Each translated line keeps its original start and end time so captions match the source video or audio perfectly.
Is multi-language transcription private and secure?
Yes. AI models run entirely in your browser via WebAssembly. Audio is never uploaded to a server. Auto-detection, transcription, and translation all happen on your device.
Is my data safe with this tool?
Yes. All processing runs 100% on your device using client-side WebAssembly, Canvas API, and browser APIs. No bytes from your files are transmitted to our servers — zero server upload, absolute privacy.
Why is the processing speed so fast?
Because your file never leaves your browser. SnapKit uses WebAssembly and Canvas to harness your device CPU and GPU directly, skipping slow network upload and download steps.