Subtitle formatter
Raw word timestamps become cues that fit the frame: characters-per-line and per-second caps, script-aware line breaking.
AutoSubsLocal AI subtitles
Free, open source, and never leaves your machine. Works alone or plugs into Resolve, Premiere and After Effects.
- Drop in audio or video
- Pick a model
- Transcribe
579.7K downloads
4.3K GitHub stars
100% on-device
0
languages supported
Eight on-device model families, including Whisper, Parakeet, Canary and Meta's Omnilingual ASR. Downloaded on demand, run entirely on your machine.
30 minutes of audio
< 60 sec
30× faster than real time. No GPU required.
Parakeet, Orukeet and SenseVoice on an Apple M3 MacBook Pro. Nothing uploaded, nothing queued.
Includes the whole package
Word-level timing
Forced alignment puts a timestamp on every word, so karaoke captions and word-by-word highlighting land on the beat.
Knows who is speaking
Diarization labels each voice automatically, so everyone in an interview can carry their own style.
Lands in your editor
Real styled text on a Resolve timeline, caption tracks in Premiere Pro, text layers in After Effects.
Nothing leaves your machine
No upload, no account, no telemetry. Footage under NDA stays on the drive it came from.
Free, open and native
MIT licensed, Rust transcription engine, Mac, Windows and Linux. No paid tier behind a feature flag.
What people use it for
Social and YouTube
Burned-in captions styled to match your channel, generated in the time it takes to make coffee. Most views arrive on mute.
Subtitling and translation
Transcribe in one language, translate into another, and export SRT for every version of the cut you need to deliver.
Interviews and documentary
Speaker labels across long multi-person recordings, with word-level timing for paper edits and pull quotes.
Funded by the community
“i was searching for hours for a decent service to add captions. this is better than almost all the paid ones i tried!”
“This tool allows me to edit my videos in a snap! … It's actually the reason I finally (and gratefully) switched 100% from CapCut!”
“I LOVE this script, it works so much better than DaVinci's subtitle creator … the ability to limit the subs to however many lines i want, however many words per said line. THIS ALONE, makes a HUGE difference.”
“The fact that it runs locally is quite appreciated too, I'd like to avoid uploading my voice to who-knows-where if at all possible.”
“Subtitling our videos is so challenging because of all the music in the audio, but AutoSubs is amazing and gets very close every time. … Thank you for being the kind of human who makes it free.”
“Saves me literally hours every single week for my business. You are a good man for making this free. When my business grows I'll get you more coffees.”
“Love this plugin, Tom. In a world of subscriptions fees for everything, this is an incredible breath of fresh air.”
“This is one of the best pieces of free software I have ever used, saves me hours of time. keep it up brother, thank you so much”
“You made my day, thank you so much !!! Needed this in a pinch for NGO work the night before an event, and your work made it possible”