CC 工具分类

字幕与创作者工具

转换、修复、分析和制作字幕、章节及社交视频素材。

21 个工具

SRT to VTT Converter Convert SubRip subtitles to WebVTT in your browser.

VTT to SRT Converter Convert WebVTT captions to numbered SRT subtitles.

Subtitle Time Shifter Move every SRT or VTT timestamp forward or backward.

Subtitle Encoding Fixer Convert garbled SRT and VTT files to UTF-8.

SRT Renumber and Repair Tool Renumber cues and clean common SRT block formatting errors.

Subtitle Word and Reading Speed Counter Count cues, words, characters, duration and reading speed.

Subtitle Line Break Fixer Wrap and balance long subtitle lines without changing timestamps.

Subtitle Reading Speed Checker Measure words per minute for every subtitle cue.

Subtitle CPS Calculator Calculate characters per second and flag dense captions.

Subtitle Duration Calculator Measure cue duration, gaps, overlaps and total subtitle coverage.

Subtitle Case Converter Change subtitle text case while preserving timestamps and tags.

Remove Hearing-Impaired Captions Remove sound descriptions, speaker labels and music symbols.

Merge Two Subtitle Files Combine two SRT or VTT files into one ordered subtitle track.

Split Subtitle File Split SRT or VTT subtitles by cue count, duration or equal parts.

Subtitle Translator Template Export Export subtitle cues to CSV, TSV or JSON translation templates.

YouTube Chapter Generator Build chapter timestamps from titles and segment durations.

YouTube Timestamp Formatter Normalize mixed timestamp lists for descriptions and comments.

Video Aspect Ratio Calculator Calculate ratios, scaled dimensions, crop and letterbox sizes.

Social Video Safe-Zone Preview Preview text and UI safe zones over a local image.

Online Teleprompter Run a mirrored, adjustable browser teleprompter.

Caption Background Generator Create downloadable caption cards and text backgrounds.

浏览器本地处理

这些工具通过浏览器 API 在设备上处理所选文件、生成文档或计算尺寸，不使用远程处理接口。

浏览器兼容性

现代浏览器支持本地文件读取、SVG、Canvas、下载和交互计算。特殊格式应在目标用户常用浏览器中测试。