Murmur listens to your mic or your Mac's audio and turns live speech into a bilingual transcript — instantly and privately. Speech recognition and translation run entirely on your Mac.
Translates between the languages you speak
Point it at any audio, pick two languages, and read the conversation as it happens — kept private and saved for later.
Speech is recognised and translated the instant it's spoken — original and translation, line by line. A one-time on-device model download means it keeps working offline, at the quality you choose.
Caption someone in the room, or pull straight from calls, videos and meetings playing on your Mac.
Pop captions out into a small overlay that floats over any app — drag it anywhere, bilingual or translation-only.
Every session is saved locally as a transcript you can search, reopen and read back — never on a server.
Save a transcript as subtitles (.srt), WebVTT (.vtt) or plain text — or copy the whole thing in one tap.
Drop the transcript into a floating glass overlay and keep watching — a film, a call, a lecture — with the translation right under each line.
Speech recognition and translation happen entirely on-device. After the one-time model download, Murmur keeps working with no internet at all — your conversations never leave the machine.
Still unsure about something? Reach the team — a real person replies.
No. Speech recognition and translation run entirely on-device. There's no account and no cloud — nothing is uploaded, ever. After the one-time model download, Murmur works with no internet at all.
Your microphone — voices in the room or your own — or your Mac's system audio, so it can caption calls, videos, podcasts, lectures and meetings. You can switch source anytime.
It translates both directions between languages including English, Chinese (中文), Japanese (日本語), Spanish and Korean. Pick a spoken language and a target, and swap them whenever you like.
Yes — once. On first run Murmur downloads its on-device speech and translation models. You can choose a quality tier (Standard 0.8 GB, High 1.8 GB, or Extra high 5.2 GB); after that everything runs offline.
Every session is saved locally to a searchable library. Export any transcript as subtitles (.srt), WebVTT (.vtt) or plain text, or copy the whole thing to the clipboard.
A Mac running a recent version of macOS. Apple silicon is recommended for the lowest latency and the best on-device performance.
Download Murmur and start a live, private, bilingual transcript in seconds.
Download for Mac