Write a script, pick or clone a voice, export WAV. No credits, no subscription, nothing uploaded.
Free to download, Pro free for 3 days · 7-day refund · macOS 15+ on Apple Silicon
Preview of the Mac app. Voices play recordings made in Murmur; generation, cloning and installs are simulated.
Introducing Murmur
Most cloud voice tools bill by the character and process your script on their servers. Every project adds to the bill, and the bill never stops.
Murmur is a voice studio built to run on your Mac. It generates, clones and designs voices locally, so you can make podcasts, audiobooks and voiceovers with no credits, no subscription and no uploads.
Hear it
Some ideas start as a scribble. A sentence in your notes. A story you cannot stop thinking about. Give yours a voice.
Kokoro · English (US). Pre-recorded in Murmur on a Mac. The app generates new audio from your own scripts.
What you can make
Podcasters, audiobook authors, YouTubers, course creators, game developers and agencies all start the same way: a script. Murmur runs the voice model on your Mac, so you can make as much as you need. The only limit is the script.
Read my new intro in my own voice
Your recording
Murmur, reading something new
Clone. Give Murmur a short recording and it reads new scripts in that voice. The reference here is a synthetic Voice Design voice. Needs 16 GB+ memory and an optional model. Starter kit
A warm British storyteller. Hushed, then delighted.
Design. Describe who is speaking and how, and Murmur builds a voice from the sentence. No recording needed. Voice Design
Turn this script into a two-host podcast
Produce. Cast every speaker, fix a single line on the timeline, and export WAV or M4A. Projects
Whisper it. Then let the tension break.
whisper Do you hear that? long pause There it is again. inhale Something is moving behind the wall…
Direct the delivery. Write [whisper], [laughing] or [long pause] in the script and expressive models perform it. Optional Fish S2 Pro model. More expressive samples
Narrate this in French. 600+ languages to pick from.
Many languages. Kokoro covers the common ones. The optional OmniVoice model reaches 600+; coverage varies by model. Compare coverage
Automation
Run Murmur from Terminal in a build step, or connect an AI agent through MCP. The same local models, the same private audio, no API key to rotate.
Start from a voice someone shared. Check each voice's permissions before commercial use.
Browse the libraryLine up a whole book or a folder of scripts and let your Mac work through it.
See ProjectsTake finished audio straight into your editor, with no watermark and no export limit.
Export optionsOnce a model is set up, generation needs no connection. License checks and updates still do.
Privacy detailsExplore voices
Murmur opens a shared library of voices people have made. Listen to any of them, then press Use to narrate your own script. A few, picked from the library:
Male · Middle Aged
A steady and reliable narrator.
Female · Young
An engaged speaker.
Male · Middle Aged
A curious explainer.
Eric Adjei
This is a calm and professional male voice with a clear British accent and a measured tone. It has an informative quality well-suited for educational narration or storytelling.
Modestas
A deep and serious middle-aged male voice with a calm, mysterious tone. Well-suited for suspenseful narration, documentaries, or cinematic storytelling.
412887114
说话抑扬顿挫，语气温柔动听的女孩子
Belkacem Brik
25+ French Female deep voice, narrator, story, vlog en français
比留間大地
A youthful and friendly female voice with a gentle, polite tone. Her speech is clear and expressive, making it well-suited for conversational and narrative content.
The meter
Most voice tools bill by the character or by the month, and the bill grows with every project. Murmur runs on your Mac, so there is nothing to meter. Move the slider to what you pay today.
See side-by-side comparisonsMurmur pays for itself in 2 months. Over three years that is $1,031 back in your pocket.
Your number, not ours. We do not assume anyone else’s pricing. Taxes are added at checkout, and speed and quality depend on the model and your Mac.
The studio
Type, paste or drop in a file. Press / to add a speaker, and drop in [pause] or [laugh] wherever you want one.
Give each speaker a voice of their own: a built-in one, a community voice, a clone of yours, or one you described.
Regenerate a single block, nudge clips around, and export WAV or M4A when it sounds right.
On-device
Generation runs on your Apple Silicon chip, so there is no upload step and no per-character bill. Here is exactly what stays put and what still needs a connection.
Read the privacy policyFrom Murmur customers
“This is perfect, No buying credits, or monthly subscriptions. It just works”
“Murmur is an excellent AI voice cloner, I use it a lot to make DJ jingles/drops”
Murmur is an excellent AI voice cloner, I use it a lot to make DJ jingles/drops, and is even great for cloning your own voice if you can’t be bothered to record yourself. I was recently disturbed that on a previous update there seemed to be a 30 second sample limit, thereby breaking all my voice models. For me that rendered it useless, as I really didn’t want to have to start from scratch. I am very pleased to say that has now been fixed and Murmur is best in its class. All my models are now working once more. I thoroughly recommend it!
“Excellent customer service. Easy to use interface. The main model Fish-speech produces high quality audio results. Highly recommended.”
We received a prompt response regarding our issue and look forward to the fully functioning fish-audio model. (Update April 11: Excellent customer service. Easy to use interface. The main model Fish-speech produces high quality audio results. Highly recommended.)
“Amazing app, incredible quality! And the best part is it is all offline!”
Pricing
From a single voiceover to your next audiobook, the production stays on your Mac and the price stays where it is.
Before you buy
Still wondering? Talk to the maker.
Murmur is $49 USD as a one-time purchase. One purchase. One license for one Mac. Generate locally without credits, per-word charges, or a monthly subscription. Applicable taxes are shown at checkout.
Yes. Download Murmur and use it free: Kokoro voices, scripts up to 1,500 characters, export to WAV. Pro adds cloning, Voice Design, the other voice models, projects, the batch queue and automation. You can try all of Pro free for 3 days with one click inside the app, with no card, no email and no key to paste. When it ends, the app drops back to the free plan and your projects and audio stay on your Mac. Each Mac gets one Pro trial.
You need macOS 15 or later and Apple Silicon (M1 or newer). Intel Macs are not supported. Kokoro handles basic narration on compatible Macs; optional models, including voice cloning and Voice Design, require at least 16 GB of unified memory. Speed and available features depend on the selected model and your hardware.
Kokoro is bundled for basic text-to-speech. Optional models for cloning, Voice Design, and other speech features require at least 16 GB of unified memory and additional model/runtime downloads. For example, the app estimates about 1.7 GB for Qwen3-TTS Base and 2.3–4.5 GB for Voice Design, depending on the variant. These are model downloads, not total installation sizes: allow additional free space for runtimes, setup, and generated audio. Total disk space needs and generation speed vary by model and your Mac.
Speech generation runs locally after setup, but periodic online license validation is still required. Internet is also needed for purchase, activation, optional model downloads, updates, and community voice browsing. Diagnostic connections are described in the Privacy Policy; local generation does not upload your scripts or generated audio. Read the Privacy Policy.
Your Murmur purchase licenses the app. You must also follow the selected speech model’s license and have the rights and permissions needed for the script, reference recording, and voice. Community voices do not all come with the same permissions. Check those terms before publishing or doing client work. Read the usage terms.
Your purchase includes perpetual access to the version you buy and free updates for that version. Future versions and upgrades are not guaranteed. The individual license covers one active Mac; a Mac bundle covers the number purchased. To move to another Mac, the previous activation must be released. Contact support if you need help changing Macs.
Your download and license key arrive by email. Install Murmur, activate your license, and start with the bundled Kokoro model. Add optional models for other workflows. If Murmur does not fit your workflow, email your purchase receipt within 7 days to request a refund.
Apple notarization checks submitted software for malicious components. It is not an App Store review or an endorsement.
Free to download · 7-day refund · Apple Silicon Macs · Hear a sample again
