Subtitle Edit Tools

Choose a subtitle editing tool by the change you need

• Subtitle FPS Converter changes cue timing for a frame-rate conversion. Set the source and target FPS, apply the source/target ratio, compare the before-and-after preview, and download the retimed file.
• Subtitle Timestamp Shifter moves SRT or WebVTT timestamps by a fixed offset or applies a linear start-to-end drift correction. Review its preview for overlaps and negative timestamps before downloading the result.
• Subtitle Style Editor changes font, size, weight, color, outline, shadow, background, alignment, margins, and positioning. It supports global and per-cue overrides and shows format-specific limitation warnings before export.

Choose FPS conversion or a timestamp shift for timing changes

Use the Subtitle FPS Converter when subtitle timing was created for one frame rate and needs to follow another. Set the source FPS and target FPS. The page applies their ratio to the cue timestamps, which retimes the file for a frame-rate change.

Use the Subtitle Timestamp Shifter when every cue needs the same time adjustment or the timing drifts across the file. Choose a fixed offset for the first case, or a linear start-to-end correction for the second. Review the preview for overlaps and negative timestamps before downloading.

Change subtitle appearance in the subtitle file

The Subtitle Style Editor changes font, size, weight, color, outline, shadow, background, alignment, margins, and positioning. Apply a style globally or add per-cue overrides. The editor exports parsed timing and cue text, and shows format-specific warnings before export.

The Subtitle Style Editor does not burn subtitles into a video or translate cue text. It changes the subtitle file itself.

What each page accepts and exports

All three pages are browser-based and work locally, with no upload. Subtitle FPS Converter and Subtitle Timestamp Shifter work with SRT or WebVTT. Subtitle Style Editor accepts SRT, WebVTT, and ASS/SSA. Its exported formatting can change because the formats have different styling limitations.

Timing changes and appearance changes stay separate. Subtitle FPS Converter changes cue timestamps with a source/target ratio. Subtitle Timestamp Shifter changes fixed or drifting timing. Subtitle Style Editor exports parsed timing and cue text with the style settings it supports.

Subtitle editing jobs and the page to use

• A subtitle file follows footage encoded at a different frame rate. Use Subtitle FPS Converter, select the source and target FPS, inspect the retimed preview, and download the new file.
• An SRT file needs the same time adjustment for every cue. Use Subtitle Timestamp Shifter for a fixed offset, then check the preview for negative timestamps or overlaps.
• A subtitle editor needs a different font, outline, or screen position across a file. Use Subtitle Style Editor for a global change, then add per-cue overrides where individual lines need different treatment.
• An ASS/SSA file needs its visual settings adjusted while the cue timing and text are retained. Use Subtitle Style Editor and read its format-specific warnings before export.

What else is in Subtitle Tools

Subtitle Tools also includes subtitle conversion, merging, splitting, and validation. Use Subtitle Edit Tools when the file already has the right content and needs a timing or appearance change. Use the parent category when the job is to change the file format, combine files, divide a file, or check it for issues.

Frequently asked questions