Freedom251 › AI Video Caption Generators

SubVid

Free plan Web

What SubVid is

SubVid is a free browser tool for generating, editing, translating, and exporting subtitles for video and audio. It accepts MP4, MOV, WebM, MKV, MP3, WAV, and OGG files, including audio-only inputs that produce subtitle files without video. Whisper transcription runs through transformers.js with optional WebGPU acceleration, while NLLB-200 creates multilingual subtitle tracks. The editor supports subtitle text and timing changes, timeline scrubbing, multiple language tracks, and caption styling, including brand presets. Users can download SRT files or export videos with burned-in captions. SubVid says files are processed in the browser and never leave the device. AI model weights download once and remain cached in the browser; the project estimates about 150 MB for Whisper base plus the translation model. No API keys or external services are required, and the codebase has no analytics backend or user accounts. A modern Chromium browser or Firefox is recommended, while Safari may export video more slowly. The Free plan costs nothing.

Who it suits

It suits users who want local, browser-based subtitle work without accounts or external services. It also fits projects needing multilingual tracks, styled captions, or audio-only transcription.

What it does well

Files stay on the device
Supports video and audio formats
Whisper transcription with optional WebGPU
Exports SRT or burned-in video
No API keys or user accounts

What to know first

Subtitle export is SRT only
Model downloads total about 150 MB
Safari may export video more slowly
Runs in a browser

Plans

Plan	Billed and limits	Price
Free	Free to use; runs in browser	Free

As subvid.app lists them, read 11 Oct 2026. The maker's own page has the final word.

Verdict

SubVid offers a free, local workflow for transcription, translation, editing, and caption export. Browser processing and supported formats are central strengths, while SRT-only subtitle export and model downloads shape its limits.

Facts from SubVid's own pages

Audio-only use: MP3, WAV, and OGG files can be used to generate subtitle files without video. · github.com, 11 Oct 2026
Brand caption presets: Yes · subvid.app, 22 Sept 2026
Browser support: The project recommends a modern Chromium browser or Firefox and says Safari may use slower MediaRecorder video export. · github.com, 11 Oct 2026
Burn-in captions: Yes · subvid.app, 22 Sept 2026
Caption styling: Yes · subvid.app, 22 Sept 2026
Editing: The editor supports subtitle text and timing edits, timeline scrubbing, multi-language tracks, and caption styling. · github.com, 11 Oct 2026
Export: Users can download an SRT subtitle file or export a video with burned-in captions. · github.com, 11 Oct 2026
File formats: The site accepts MP4, MOV, WebM, MKV, MP3, WAV, and OGG files. · subvid.app, 11 Oct 2026
Free plan: Yes · subvid.app, 22 Sept 2026
Integrations: The project says no API keys or external services are required to run the app locally. · github.com, 11 Oct 2026
Languages: The site offers English and Spanish pages. · subvid.app, 11 Oct 2026
Local processing: The project says files are processed in the browser and never leave the device. · github.com, 11 Oct 2026
Model downloads: AI model weights are downloaded once and cached in the browser; the project estimates about 150 MB for Whisper base plus the translation model. · github.com, 11 Oct 2026
Privacy: The repository says its codebase has no analytics backend or user accounts. · github.com, 11 Oct 2026
Purpose: SubVid generates, edits, translates, and exports subtitles for video and audio in the browser. · github.com, 11 Oct 2026
Subtitle export: srt only · subvid.app, 22 Sept 2026
Transcription: The project describes AI transcription using Whisper through transformers.js, with optional WebGPU acceleration. · github.com, 11 Oct 2026
Translation: The project says it uses NLLB-200 for multilingual subtitle tracks. · github.com, 11 Oct 2026

Where SubVid stands on Freedom251

AI Video Caption Generators#68 of 99