SRT to speech: turn SRT or VTT subtitles into timed audio or a video dub

Yes. Audo voices the first 300 spoken characters of any SRT or VTT file free (always ending cleanly at a complete cue), 3 times a day, with any voice model and no sign-up—including optional video dubbing. Longer files up to 100,000 spoken characters are pay-as-you-go per 1,000 spoken characters: $0.05 with Gemini 3.8 Flash-Lite TTS, $0.08 with Gemini 3.8 Flash TTS, $0.10 with Eleven v4 Turbo, and $0.20 with Eleven v4. Cue numbers, timestamps, silent pauses between lines, and skipped [music] or JOHN: tags cost $0. There is no subscription: you pay once from $5 and your balance never expires—see pricing.

Instead of rushing speech up to 3× speed or cutting words off mid-sentence, Audo fits cues in three stages. First, the line runs into any silent pause before the next subtitle cue while keeping an 80 ms breath gap. Second, if more room is needed, Audo applies 48 kHz Rubber Band R3 pitch-preserving time-stretching in 0.025× steps up to your max speed setting (1.25× by default, adjustable from 1.0× to 2.0×) so the voice keeps its natural pitch. Third, if a dense line still runs past max speed, Audo pushes the next cue back with an 80 ms gap so voices never overlap, and lists late lines in the result so you can shorten tight translations.

Add your MP4, MOV, MKV, WebM, or AVI file (up to 10 GB) alongside your SRT or VTT file on Audo and choose one of three sound modes. Lower under the voice (the default) keeps your video's own sound and smoothly lowers it 14 dB while each line speaks and brings it back up between lines, like a documentary voiceover. Replace with the voice outputs only the new voiceover, and Keep at full volume mixes narration over quiet footage. Audo copies the original video picture untouched without re-encoding—keeping 1080p and 4K frames sharp, without altering mouth movements—and gives you both the dubbed video and the standalone MP3 or WAV track.

No. Audo strips SRT and VTT cue numbers, timestamps, formatting tags, square-bracket sound descriptions such as [music] or [door slams], short parenthetical reactions like (laughs), song lyrics between ♪ notes, leading dialogue dashes, and uppercase speaker names like JOHN: or SPEAKER 1: before reading—and charges $0 for all stripped text. When one sentence is split across consecutive cues less than 400 ms apart, Audo reads them together as one sentence.

ElevenLabs Eleven v4 ($0.20 per 1,000 spoken characters, 70+ languages) ranked first on Artificial Analysis' blind listening test for natural human delivery, and Eleven v4 Turbo ($0.10, 70+ languages) offers nearly identical realism at half the price. Note that square brackets in SRT files are stripped as sound descriptions, so if you want to use [whispers] tags on an untimed script, open Text to speech. Google's Gemini 3.8 Flash TTS ($0.08, 130 languages) and Gemini 3.8 Flash-Lite TTS ($0.05, 101 languages) cover the widest language set, cost the least on long feature-length subtitles, and let you steer the whole reading with a style description up to 2,000 characters (such as "calm documentary narrator") plus angle-bracket tags like <sigh> or <short pause>.

This page reads an existing SRT or VTT file aloud into audio or a dubbed video. If you want the opposite—turning an MP3 or MP4 recording into timed SRT captions—use Audo's SRT file generator (or Text to SRT to sync a written script to a recording). If your subtitles are still in their original language, translate them into up to five languages while keeping every timestamp in Translate subtitles, then upload the translated SRT here to voice it.

Yes. Raw ElevenLabs and Gemini TTS endpoints only accept plain text, which normally forces developers to maintain custom Python SRT parsers, Rubber Band time-stretchers, and audio ducking scripts. On Audo, one call to speak_subtitles over the REST API or Audo's MCP server (https://audo.ai/mcp) accepts your SRT or VTT file and optional 10 GB video directly from code, ChatGPT, Claude, Claude Code, or Cursor, and returns the leveled 48 kHz MP3 or WAV, the dubbed video, and per-line timing JSON.