SRT Subtitle Generator

The SRT file format — SubRip Text — is the universal language of subtitles. Every major video platform, every professional editing application, and every media player on earth understands SRT. When you need to add subtitles to a YouTube video, burn captions into a TikTok clip, provide accessibility for a corporate training video, or attach dialogue text to a film festival submission, an SRT file is what you need. The format is deceptively simple: numbered segments, each with a timestamp range and one or two lines of text. But creating an accurate SRT file manually is tedious beyond belief — pausing, typing, noting the timecode, advancing a few seconds, repeating, for every sentence of dialogue in your video. A 10-minute video can take an hour or more to subtitle by hand.

This is why an SRT file generator that automates the transcription and timing is indispensable. Hearably Studio uses OpenAI's Whisper speech recognition model, running entirely in your browser via WebAssembly, to transcribe your audio and produce a properly formatted SRT file with accurate timestamps. Drop a video or audio file onto the tool, wait for the AI to process it, review the results in the built-in editor, and export your SRT — all without your file ever leaving your device. There is no upload step, no cloud processing queue, and no third-party server that touches your content.

The SRT format consists of three elements per subtitle segment: a sequential number, a timestamp pair in the format HH:MM:SS,mmm --> HH:MM:SS,mmm, and the text content. Hearably's SRT file generator produces spec-compliant output with properly encoded UTF-8 text, millisecond-accurate timestamps derived from Whisper's cross-attention alignment, and sensible segment boundaries that respect sentence structure and natural speech pauses. The result is an SRT file that imports cleanly into YouTube Studio, Vimeo, Facebook Creator Studio, Premiere Pro, Final Cut Pro, DaVinci Resolve, Kapwing, Canva Video, and any other tool that accepts standard subtitles.

For creators who need captions across multiple platforms, the workflow is straightforward: generate once, use everywhere. The same SRT file you upload to YouTube as closed captions also works as the subtitle track in your Premiere Pro timeline, as the caption source for your Instagram Reels in CapCut, and as the accessibility track for your company's internal video portal. No reformatting, no re-timing, no platform-specific adjustments. This is the power of the SRT standard — and the auto caption generator in Hearably Studio makes creating these files faster than ever before.

Beyond basic transcription, the built-in editor lets you polish your SRT file to professional standards. Adjust the timing of any segment by dragging its boundaries on the waveform, correct transcription errors with inline text editing, split long segments that display too much text at once (the subtitle convention is a maximum of two lines, 42 characters per line), and merge overly short fragments that flash on screen too briefly to read. The editor previews your captions in real time against the audio playback, so you can verify synchronization before exporting. All processing runs client-side — your files stay private, your edits happen locally, and the final SRT file is generated in your browser and saved directly to your device.