Upload any video. SubForge transcribes it with Whisper AI and burns in styled, animated subtitles — all on your own machine.
MP4, MOV, AVI, MKV — any format
Simulating upload…
Subtitle Mode
SubForge · Whisper AI · Runs locally · No subscription
OpenAI's Whisper model runs entirely on your CPU — no API keys, no cloud, no usage limits. Your audio never leaves your device.
Subtitles are burned directly into the video using FFmpeg. Export to MP4 in seconds, ready to post anywhere.
Font size, color, highlight color, vertical position — drag to place subtitles anywhere on the frame with live preview.
Edit every word, fix timestamps, delete mistakes. Search across all words and make precise edits before export.
Runs completely offline after setup. No data sent to any server. Perfect for confidential content creators.
Just run start.bat on Windows or start.sh on Mac. Auto-installs everything and opens in your browser instantly.
Match your style to your content. Switch modes before export — the live preview updates instantly.
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Have questions, collaborations, or feedback about SubForge? Reach out anytime.