About Fast Subtitle

Fast Subtitle is a free, browser-based subtitle creator andSRT file generator built for anyone who needs accurate, good-looking captions without the friction of heavy desktop software or paywalled online tools. Open the app, add your text or media, and start building subtitles in seconds.

Our mission

We believe captioning should be fast, private, and free. Most subtitle tools ask you to upload your footage to a server, create an account, or pay for basic exports. Fast Subtitle does the opposite: everything runs locally in your web browser, so your files never leave your device and there is nothing to install or sign up for.

What you can do

Write and auto-time captions or set every timecode by hand on a multi-track timeline, style your text with fonts, colors, outlines, and presets, and export exactly what your workflow needs — a standard SRT file, an LRC file generator output for synced lyrics, plain text, or a transparent subtitle overlay video (WebM with a real alpha channel) that drops straight onto your footage in any editor. Export presets cover everything fromvertical video subtitles at 9:16 to 16:9 and 4K.

Who it's for

Video editors, social creators, podcasters, musicians, educators, marketers, and accessibility teams all use Fast Subtitle as a dependable online subtitle creator andclosed caption creator. Whether you are captioning a single Reel or a full episode, the same private, browser-based workspace scales to the job.

Have feedback or a feature request? We'd love to hear it — head over to ourContact page.