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Free tools

Small, focused utilities for subtitle and video work. Every tool runs entirely in your browser — your files are never uploaded to a server.

⏱️SRT Shifter & ConverterShift subtitle timings forwards or backwards, stretch for frame-rate changes and convert between SRT and WebVTT.Free · runs in your browser 📏Caption Speed CheckerPaste an SRT file and see characters per second, words per minute and line lengths for every caption.Free · runs in your browser 🖼️Image ReplicatorBatch-duplicate and rename numbered images scene by scene, then download a ZIP. Runs entirely in your browser.Free · runs in your browser

Why browser-based?

Subtitle files and raw footage are often unpublished client work. Because these tools process everything locally with JavaScript, nothing leaves your device, there is no sign-up and no file-size queue. Learn more about keeping client footage private.