Txtloom is a free set of subtitle and transcript tools that run entirely in the browser tab.

Make. Transcribe an audio or video file, or a microphone recording, with a Whisper speech model that runs on your own device. Correct the text line by line, name the speakers, and download TXT, Word, SRT or WebVTT.

Convert. Turn subtitle files from SRT, WebVTT, ASS/SSA, LRC, SBV or TTML into SRT, WebVTT, plain text or ASS. The format is detected from the file, and batches download as a ZIP.

Fix timing. Shift every subtitle earlier or later, or repair drift by syncing two points or changing the frame rate. Only the times change; the rest of the file stays as it was.

Files are never uploaded and no account is needed. Recordings are limited to 100 MB and 15 minutes.

I built it because most free transcription and subtitle tools upload your file and ask you to sign up before you can download the result.