Online or offline · No API keys · Runs locally

Script in.
Studio-grade audio out.

Konvertex is a neural voice studio that turns any script into high-quality narration. Use Microsoft Neural voices online, or stay fully offline with Kokoro — runs on your laptop, no signups, no quota games.

CA$2.99/month standalone — or free with any Kaptain subscription. No limits, no character caps, all voices.

Voices & engines Microsoft Neural (online) Kokoro TTS (offline) Linux macOS (Apple Silicon + Intel) Windows 10 / 11
// CORE FEATURES

High-quality narration
without the API gauntlet.

Most TTS tools either lock you behind a paid API or ship low-quality voices. Konvertex gives you both — premium neural voices online and capable offline voices when you don't want to be online at all.

01 · Online

Microsoft Neural voices

Hundreds of high-quality neural voices across dozens of languages. No Azure account, no API keys — Konvertex handles the request.

02 · Offline

Kokoro TTS — fully local

Stay fully offline with the Kokoro neural TTS model running locally. Great voice quality, zero network, zero privacy concerns.

03 · Workflow

Paste a script. Hit generate.

No fiddly setup. Drop your script into the editor, choose a voice, click generate. Audio file appears.

04 · Install

One-zip launch

Download the zip for your OS, unzip, launch. No Python install, no dependency hell. Browser UI opens automatically.

// THE FLOW

Three steps.
One audio file.

Konvertex is built for people who want narration done, not a digital audio workstation. Open, paste, generate. Output to MP3 or WAV. Use it anywhere.

  • Pace, pitch, and voice selection in one panel
  • MP3 or WAV output
  • Browser UI at localhost:8004
  • Same workflow on Linux, macOS, Windows
konvertex · studio
"Welcome to the future of self-hosted voice synthesis. Konvertex puts a studio in your laptop — no accounts, no API keys, no quota."
VOICE
Aria — Neural en-US · online
Kokoro — Heart en-US · offline
// DOWNLOAD

Builds shipping soon.

Konvertex binaries are being prepared for each platform. Click your OS to join the early-access list — you’ll get the build by email the moment it’s signed and uploaded.

Linux
x86_64
Coming soon
Windows
10 / 11
Coming soon
macOS
Apple Silicon
Coming soon
macOS
Intel
Coming soon

// Once builds ship: ./konvertex.sh start  (Linux/Mac)  ·  konvertex.bat start  (Windows)

On first launch, you’ll paste your CHYNJ key (Kaptain subscribers) or subscribe for CA$2.99/mo to unlock. See pricing →

// PRICING

CA$2.99/month.
Or free with Kaptain.

No usage caps. No character limits. No feature gating. Get everything Konvertex does with a small monthly subscription — or get it included free with any Kaptain plan.

Studio
Volume

For agencies & podcast networks

High-volume audio production with API access, priority rendering, and custom voice training. Per-seat or volume contract.

  • Everything in Konvertex
  • API access for automated pipelines
  • Priority rendering queue
  • Custom voice training
  • Volume pricing & SLA
Contact sales

// Already a Kaptain subscriber? Download Konvertex, paste your key in Settings, activate for free.

Stop renting voices by the minute.

CA$2.99/month, no limits — or pull all three CHYNJ products into one Kaptain subscription and get Konvertex free.

Get Konvertex via Kaptain Join the waitlist