How accurate is Vietnamese transcription with Whisper?

Whisper performs well on Vietnamese for clean audio. Background music and overlapping speech reduce accuracy in any language — Captionly's inline editor lets you fix slips by clicking on the wrong word.

Does Captionly transcribe Vietnamese in its native script?

Yes — the exported SRT is UTF-8 and loads cleanly in any modern editor or platform.

Is my Vietnamese video private?

Yes — Captionly runs Whisper in your browser. Your video is never uploaded. The transcription and the burn-in render both happen on your device.

Can I edit the Vietnamese transcript before exporting?

Yes. Click any word to seek to that moment in the video, type a correction inline, the word-level timing stays locked. Edits are reflected in the SRT and the burned-in MP4 automatically.

Are accents and special Vietnamese characters preserved in the SRT?

Yes. All exports are UTF-8 so Vietnamese characters, diacritics and full-width punctuation (where applicable) survive the export and load correctly in any modern editor or platform.

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Whisper · Vietnamese · Free · No watermark

Free Vietnamese subtitle generator

Drop a Vietnamese-language video and Captionly transcribes it with AI Whisper, lets you fix names and proper nouns with a click, and exports SRT, VTT, ASS or a burned-in MP4. Detects Vietnamese automatically. Free, in-browser, no signup.

Vietnamese-language video has its own audience and its own search index. Captions extend the reach: they make Vietnamese video accessible to sound-off viewers, indexable to search in Vietnamese, and ready for downstream translation. Captionly is a free Vietnamese subtitle generator that runs Whisper locally in your browser, supports inline editing, and exports the formats every editor and platform accepts.

Drop your video here

or click to browse your files

Supports MP4, MOV, AVI, WebM (max 500MB)

100% freeno signupno watermark50+ languagesSRT · VTT · TXTprivate by defaultAI-powerededit on the flyTikTok-readypodcast-readycreator-loved100% freeno signupno watermark50+ languagesSRT · VTT · TXTprivate by defaultAI-powerededit on the flyTikTok-readypodcast-readycreator-loved

✦ Built for Vietnamese-language content

Built for Vietnamese-language content

Accuracy on Vietnamese audio, plus the controls editors need to ship.

Whisper transcription for Vietnamese

OpenAI Whisper transcribes Vietnamese into its native script with word-level timing. Runs entirely in your browser via WebAssembly — no upload, no API key.

Auto language detection for Vietnamese

Drop the file and Captionly detects Vietnamese automatically. No need to pick a language up front, no setup screen.

Click-to-fix Vietnamese transcript

Misheard a name or proper noun? Click the word, type the correction in Vietnamese, the timing stays locked. Glossary handles recurring slips across the whole video.

Native Vietnamese characters preserved

All exports are UTF-8 so Vietnamese characters, diacritics and punctuation survive cleanly into SRT, VTT, ASS and the burned-in MP4.

Burn into MP4 or export Vietnamese SRT

Download a finished MP4 with Vietnamese subtitles baked in, or an SRT to drop into YouTube Studio, CapCut, Premiere, DaVinci Resolve or FFmpeg.

No watermark on your Vietnamese video

Free forever — no email gate, no Captionly logo on your Vietnamese-language video, no daily quota.

About Vietnamese transcription

Tiếng Việt

Script: Latin
Direction: Left-to-right
Language family: Austroasiatic → Vietic
Native speakers: ~85M
Whisper accuracy: ~89%

Accuracy figures are approximate (100 minus the word error rate reported in the OpenAI Whisper paper, Appendix). Real-world results vary with audio quality, accent and dialect.

✦ Showcase

Real videos.
Real captions.

See how creators of every kind are using Captionly. Drag to browse, click to play.

Cooking creator with neon style subtitles

EN0:42

Neon Pop

thischangedmylife

EN1:18

Box Highlight

andthat'swhenIquit

EN0:21

Gradient Wave

onemorerep!

EN2:04

Karaoke

Tokyoatgoldenhour

EN0:56

Bounce

bestadviceever

ES0:33

Outline

novasacreer

EN0:28

Shadow Pop

let'sgo!victory

EN1:45

Underline

watchthistrick

EN0:52

Glitch

thisisinsane

EN0:38

Minimal

feelthebeat

EN0:19

Rainbow

hitthatmove

EN0:47

Pill

waitforit

✦ FAQ

Vietnamese subtitles — questions to ask

Practical answers for editors working with Vietnamese-language video.

Related tools

Free · Whisper · Vietnamese-ready

Caption your Vietnamese video

Drop a Vietnamese-language clip, edit the transcript if needed, ship an SRT or a captioned MP4. Free, in-browser, no signup.

Caption a Vietnamese video