MOJIOKO

Transcribe and create subtitled videos

Free

All core features are free: transcription, editing, subtitle text export, and subtitle video export.
Includes one default font (Noto Sans JP).

Download

Paid

Access to all features, including paid-only features added in future updates.
Use 12 additional fonts prepared by MOJIOKO (8 Japanese + 4 Latin), with more possibly added in future updates.
Available on the Microsoft Store, with automatic updates to always stay on the latest version.

Get it on Microsoft Store

System Requirements

OS:Windows 10 / 11 (64-bit)
Memory:16 GB or more recommended
Storage:10 GB or more free space recommended (includes AI model downloads)
GPU (optional):Faster processing with an NVIDIA GPU (CUDA). Also runs on CPU without a GPU.

View release notes

User Guide FAQ, OBS Setup, and More Feedback Bug reports & feature requests

What you can do with MOJIOKO

High-accuracy automatic transcription

Automatically transcribe speech from video or audio using Whisper, a high-accuracy speech-recognition AI developed by OpenAI. Even long videos are transcribed into text in one go.

Works with both video and audio files. For videos with multiple audio tracks, you can pick which track to transcribe.

💡 Multiple audio tracks?Videos where different sounds — like game audio and mic voice — are recorded separately. MOJIOKO lets you transcribe just the voice.

GPU acceleration

Run Whisper on an NVIDIA GPU for significantly faster transcription. Even long videos finish in a fraction of the time compared to CPU.

The CUDA / cuDNN runtime (~1.1 GB) downloads once from inside the app on first use — no separate CUDA install required.

A GPU is optional; MOJIOKO runs on CPU without one. The latest NVIDIA generations, including RTX 50 series (Blackwell), are supported.

💡 Limitations & detailsNVIDIA GPUs only (AMD / Intel GPUs are not supported). See the GPU acceleration section of the User Guide for details.

Flexible subtitle editing

Edit text and appearance freely

Fix the transcribed text, and adjust the font (paid version only), size, color, and outline color/thickness.

Adjusting subtitle timing on the timeline

Adjust timing on the timeline

Drag to change how long each subtitle stays on screen.

List view for reviewing and editing subtitles

Review and edit in a list view

See all subtitles at once and edit them in bulk.

Trimming unwanted sections on the timeline

Trim out unwanted parts

Cut unneeded sections on the timeline.

💡 Timeline?A horizontal bar showing the flow of time in your video, so you can edit when each subtitle appears.

Export as text or SRT

Export the transcription as a plain text file or in SRT format.

With SRT, import subtitles — complete with start/end times — into video editors like DaVinci Resolve.

You can also load the exported text into speech tools like VOICEVOX to generate voices.

💡 SRT?The standard subtitle file format, pairing each line of text with its on-screen timing. Supported by most video editors and platforms.

Burn in subtitles and export video

Burn your edited subtitles directly into the video.

Merge multiple audio tracks into one, ready to upload to YouTube and more.

💡 Burn-in?Embedding subtitles into the video itself, so they always show on any player.