Voice Studio Pro v3.0
Professional Voice Typing Studio by Prime Tool Hub. Free online speech-to-text with custom voice commands and multi-language Google translation working securely in your browser.
Table of Contents
Faster at talking than typing, or just giving your hands a rest? Dictate into your microphone and watch your words appear as text you can copy out. Handy for drafting notes, capturing ideas quickly, or writing when typing is awkward.
🎙️ Voice Studio Pro
Dictate with your voice, clean up the transcript, measure how you speak, and translate — all on your own device.
What we found
Fixes to apply
Words you lean on most
Longest sentences
Voice commands
Say any of these while dictating and the word is turned into the action instead of being typed out.
Custom vocabulary
One correction per line, written as heard = wanted. Useful for names and technical terms the recogniser keeps getting wrong.
Related tools
- AI Offline Transcription — for an existing audio file rather than live speech
- Text to Speech Generator — the reverse direction
- Word Counter & Case Converter — deeper text statistics
- AI Text Summarizer — condense a long transcript
Accesses native browser acoustic models to perform highly accurate, client-side speech-to-text processing without external server delays.
Automatically writes transcription data to the browser’s local storage, preventing data loss during extended dictation sessions.
Executes synchronous document object model updates, converting audio frequency buffers into text streams instantly on screen.
Select your target language from the dropdown to load the corresponding acoustic model into your browser’s memory.
Allow hardware permissions when prompted so the system can intercept and analyze analog audio streams from your microphone.
Speak clearly into the microphone. Use defined trigger phrases like “new line” or “full stop” to format the text algorithmically.
Once finished, use the document translation API or extract the raw string data locally as a downloaded text file.
Last Updated: July 2026
🔴 Four Tabs, One Workflow
Dictating is the easy part. What usually eats the time is everything after: pulling out the “um”s, fixing sentences that all start in lower case, and working out whether the talk you just rehearsed actually fits its time slot. This page now handles that whole run rather than just the first step.
Dictate — sixteen languages, and it learns your words
Pick a language, press Start Dictation and speak. Two settings are worth turning on before you begin.
Custom vocabulary is the one that quietly saves the most time. Recognisers mangle names and technical terms consistently, and always in the same way, so you can just tell the page what to do about it. One rule per line:
prime tool hub = Prime Tool Hubjava script = JavaScriptmy sequel = MySQL
The rules are saved in your browser, so they persist between sessions on this device.
Automatic punctuation watches the gap between phrases. Pause for more than about a second and a half and a full stop is added for you. It is not perfect — a pause for thought mid-sentence gets read as the end of one — which is why the Cleanup tab exists.
Voice commands are editable in the sidebar. Say “new paragraph”, “full stop”, “comma” or “question mark” and the word becomes the mark instead of being typed out. Say “stop dictation” and the microphone switches off without you reaching for the keyboard.
Cleanup — what a transcript actually needs
Paste a transcript or pull the text straight from the editor, and the scan counts what is there before changing anything: filler words, repeated words, double spaces, stray spaces before punctuation, and sentences starting in lower case.
A worked example. This went in:
um so the the main idea is simple , you know . i think it works
and this came out:
So the main idea is simple. I think it works
Note what happened to the comma. Removing “you know” would normally leave you with “simple, .” — a comma stranded in front of a full stop. The cleaner collapses that pair rather than handing you the mess it created. Order matters elsewhere too: fillers come out before capitalisation is applied, because deleting a sentence-opening “um” afterwards leaves a lower-case sentence start.
Analytics — numbers you can act on
This tab exists mainly for people rehearsing something out loud. It reports words per minute, sentence length, filler ratio, Flesch reading ease, an approximate grade level, the words you lean on most, and your longest sentences.
The speaking time is captured automatically while you dictate, so words per minute needs no setup. If you are analysing a transcript you did not dictate here, type the duration into the seconds box instead.
A rough guide: 130 to 160 words a minute is comfortable listening. Below 110 tends to drag. Above 180 loses people, particularly anyone following in a second language — which, if you are presenting internationally, is most of the room.
Translate — on your device or not at all
This tab uses the browser’s own built-in translation models. The language pack downloads once, then translation runs on your machine with no network involved.
There is deliberately no fallback to an online translation service. A server-based translator would work in every browser, but it would mean posting whatever you just dictated to somebody else’s machine — and for meeting notes, client details or anything medical, that is not a trade worth making silently. If your browser cannot do it locally, the tab says so plainly.
🟡 Honest Limits
Where the speech recognition actually runs
Worth being straight about this, because the distinction is easy to miss. Everything this page does with your text — the cleanup, the analytics, the vocabulary rules, the saved drafts, the translation — runs locally in your browser and is never sent anywhere.
The speech recognition itself is a different matter. It is provided by your browser, not by this page, and most browsers process the audio through their own service rather than on the device. Chrome sends it to Google’s speech service; Safari uses Apple’s. That is a property of the browser feature every dictation site relies on, and no web page can change it.
The practical upshot: for genuinely confidential audio, dictate to a locally running model instead. The AI Offline Transcription tool downloads a speech model into your browser and transcribes a recorded file with no audio leaving your machine at all. Record first, transcribe there, then bring the text here for cleanup and analysis.
Browser support
🔵 Dictation needs the Web Speech API — Chrome, Edge and Safari have it; Firefox does not. The page detects this and tells you rather than showing a button that does nothing.
🟠 On-device translation ships in Chrome and Edge 138 and later. Elsewhere the tab reports that it is unavailable.
🟣 Cleanup and Analytics work in every modern browser, because they are plain text processing with nothing exotic behind them.
Accuracy is not evenly distributed
Recognition quality varies a great deal by language. English, Spanish, French, German and Mandarin are well served. Sinhala and Tamil are supported but noticeably weaker, and accented English is handled less reliably than the marketing around these systems suggests. Custom vocabulary helps with the repeated errors; it cannot fix a model that was thinly trained on your accent.
Drafts live in this browser only
The auto-saved draft, your vocabulary rules and your voice commands are stored in this browser’s local storage. They survive a refresh or a closed tab, which is the point. They do not sync to your phone, and clearing site data or using a private window wipes them. Export anything you need to keep.
🟢 Going Deeper
If you want to understand why speaking slowly makes recognition worse rather than better, why homophones are the hardest thing a recogniser faces, and how on-device models changed the privacy picture, the companion article covers it: how speech recognition actually works.
The technical references are MDN’s Web Speech API documentation and MDN’s Translator API reference.
❓ Frequently Asked Questions
Is my dictated text uploaded anywhere?
The text is not. Cleanup, analytics, vocabulary and translation all run in your browser. The audio itself is handled by your browser’s own speech service, which in Chrome and Safari is processed remotely.
Why does dictation not work in Firefox?
Firefox has not implemented the Web Speech API. The other three tabs work there normally — you can paste a transcript and use Cleanup and Analytics.
The recogniser keeps misspelling a name. Can I fix it?
Yes. Add a line to the custom vocabulary box as heard = wanted. Every future session applies it automatically, and the rule is saved in this browser.
Why is speaking slowly making accuracy worse?
Recognisers use surrounding words to decide between similar sounds. Isolating each word removes that context, so a natural pace usually produces a better transcript than careful over-enunciation.
What counts as a filler word here?
Um, uh, erm, hmm, you know, I mean, sort of, kind of, basically, actually, literally, obviously and like. They are matched as whole words, so “umbrella” is left alone.
Is a good words-per-minute figure the goal?
Only as a guide. Between 130 and 160 suits most audiences. A technical explanation is fine slower; the number matters most when you are fitting a talk to a fixed slot.
Can I transcribe an audio file I already have?
Not on this page — this one listens to a live microphone. For an existing recording, use the AI Offline Transcription tool, which runs a model locally on the file.
Will I lose my text if the page reloads?
No, provided the local draft option is ticked. The text is saved in this browser as you type and restored when you come back on the same device.
Why does translation only work in some browsers?
It uses the browser’s built-in on-device models, which currently ship in Chrome and Edge 138 and later. We do not fall back to an online service, because that would mean uploading your text.
