SRT Editor Online for Subtitle Timing and SRT–VTT Conversion

It opens SRT and WebVTT files, lets you edit caption text and timecodes, shifts or stretches subtitle timing, validates cues, previews subtitles with local media, and exports SRT, VTT or plain text.

Yes. Import an SRT file or paste its contents, parse the cues, edit text and timing in the subtitle table, then download the corrected SRT file.

Yes. Import or paste SRT subtitles, choose WebVTT as the output format, and download the converted VTT file.

Yes. The parser reads standard WebVTT cues and exports their timing and text as numbered SRT subtitle blocks.

Use Timing Shift. Enter a positive delay to move subtitles later or a negative shift to move them earlier, then apply it to all cues, selected cues or cues from a chosen number onward.

Yes. Timing shifts can be entered in milliseconds, seconds or frames. Frame-based shifts use the selected frame rate.

Yes. Select individual cues in the editor and apply timing, deletion, merging or media-sync actions only to those selections.

Yes. Apply a percentage timing scale or set a new final end time. This is useful when subtitles gradually drift out of sync.

Yes. Choose the original and target frame rates to scale all cue times for common film, PAL and NTSC timing differences.

Yes. Load a local video or audio file without uploading it. The active cue is shown while the media plays, and selected cue boundaries can be set from the current playback time.

No page-specific upload endpoint receives the media. The browser creates a temporary local object URL, which is released when the media is removed or the page closes.

No page-specific server endpoint receives imported or pasted subtitle content. Parsing, editing, validation, conversion and downloads happen in the current browser session.

No. The tool may remember non-content preferences such as page size or output format, but it does not store subtitle text in browser storage.

The editor imports SRT, VTT and plain text containing SRT- or VTT-style cues. It exports SRT, WebVTT and text-only subtitle output.

SRT commonly uses numbered cues and commas before milliseconds. WebVTT begins with a WEBVTT header, uses periods before milliseconds, and can include cue identifiers and display settings.

Yes where practical. Cue identifiers and timing-line settings parsed from a VTT file are retained for VTT export unless the option to omit cue settings is selected.

Yes. Each cue text field supports multiple lines. Validation can warn when a cue exceeds the chosen line count or line-length guidance.

Yes. The cleanup tools can remove common subtitle markup while preserving the readable text. Review the result because styling information cannot be restored automatically.

Yes. Search caption text and replace the current match or every match. Case-sensitive matching can be enabled.

Yes. Select two or more cues and merge them into one cue spanning the earliest start and latest end, with their text combined in timeline order.

Yes. The Split action divides a cue near the middle of its text and duration, creating two editable cues.

The validation panel identifies overlaps. A cleanup action can shorten earlier cue endings to create the requested minimum gap when the timing permits.

It estimates characters per second for each cue. This is a practical readability indicator, not a universal broadcasting rule, so thresholds can be customized.

A cue may have an unreadable timecode, an end time that is not later than its start, negative timing, empty text, excessive reading speed, too many lines, long lines or overlap with another cue.

Yes. Undo and Redo restore recent cue, timing and cleanup changes made during the current page session.

Yes. Use Copy Output to copy the complete generated SRT, VTT or plain-text result when clipboard access is permitted.

Yes where available. The filename is sanitized and prefixed with correctioncopy.com_, followed by an edited or converted suffix and the selected output extension.

Yes. Controls stack on narrow screens and the cue table remains horizontally accessible. Editing many cues is generally easier on a tablet or computer.

Current Chrome, Edge, Firefox and Safari releases support the main parser, editor and file downloads. Clipboard behavior and local media-codec playback can vary by browser and device.

The editor is designed for practical text subtitle files up to 10 MB and 20,000 parsed cues. Very large files may require more memory and can be slower on phones.

The browser may not support the media codec even when the file extension is familiar. Try a browser-compatible MP4, WebM, MP3, M4A or WAV file, or use the subtitle editor without media preview.

Choose Reset Tool to restore the sample subtitles, default controls, validation settings and output options. Any temporary local media reference is also removed.