Features

Built for serious caption workflows on Windows

InstantSubtitles combines local AI transcription with an editor that respects pro deliverables — not a stripped-down web uploader.

Local Whisper transcription

Download models from Tiny through Large v3 (and turbo / quantized variants). Fast, Balanced, and Quality presets map to real whisper.cpp decode settings. Multi-language input chips and optional English translation output for dual-track projects.

Regional download mirrors + auto fastest mirror
Retry and clearer errors when a pass fails
Release file locks from the Models panel

Models panel: generation speed, GPU acceleration, and Whisper model downloads

Subtitle style panel with speaker colors, fonts, and on-video preview

Style & on-video placement

Primary and secondary subtitle styles: font, size, outline, shadow, colors, and margins. Drag subtitles in the preview; corner resize syncs with ASS burn-in at 1080p reference. Google Fonts download automatically for embedded exports.

Cue list & timeline

Edit text inline, nudge timings on the timeline, split and merge cues, and jump from a cue to the playhead. Import existing SRT. Undo/redo for timing edits. Context menu actions match desktop expectations.

Scrub the timeline, edit on screen, and fine-tune cues in the sidebar

Export panel with SRT, soft MKV, hard burn-in, and hardware-accelerated encoding

Export & codecs

Soft subtitles (muxed), hard burn-in, or SRT sidecar. Social presets for common aspect targets. Pick video encoder, quality, FPS mode, and audio bitrate/sample rate. Output next to your source video by default — open the folder in Explorer when done.

Hardware & models

CUDA & Vulkan

Detect GPU from the app. Install NVIDIA CUDA or cross-vendor Vulkan whisper runtime with mirror selection — no manual PATH hacking.

Models folder control

Use Local App Data, choose a custom folder, clean partial downloads, and avoid OneDrive-synced paths that lock multi-gigabyte files.

Project files

Save and reopen projects with cues, styles, and export settings. Recovery prompts if the app closes unexpectedly.

Updates

Help → Check for updates compares semver against instantsubtitles.cc and opens the download page when a newer build is available.

Licensing & trial

Try free: unlimited Generate on any length. Export trial: 10 hard burn-ins (max 0:30 each). Soft mux and SRT need a $12.99 license — Help → License… after you buy with PayPal.

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