Srt Subtitle Tools

SRT Subtitle Toolbox is a local subtitle editor for Android. Import, preview, split, merge, convert, and edit SRT files on your device. Files are not uploaded to a server.

Processing and preview are free. Export and copy-all can be tried 5 times. Unlock once for unlimited use — this is not a subscription.

Built for bilingual subtitles, translation matching, timeline fixes, and TXT ↔ SRT conversion.

BILINGUAL

• Split bilingual SRT into two separate files

• Merge language A and B, with timeline alignment or line swapping

• Match a translation TXT to an existing SRT (first line, second line, each line, or timecode)

• Filter by Chinese / English, or by dual-line A / B

CONVERT

• TXT to SRT with character-based or fixed cue duration

• SRT to TXT for proofreading and translation

• Convert Chinese to Hanyu Pinyin or Zhuyin, with optional tones and original text

TIMELINE

• Combine multiple SRT files in order, with interval padding and optional audio duration

• Shift the whole timeline by step or deviation

• Crop by start / end time, including batch crop and reset-to-zero

• Close tiny gaps; optionally snap each cue’s end to the next start

EDIT

• Smart split by punctuation or custom words

• Reformat by word, character, wrap, or Chinese sentence

• Add prefixes / suffixes

• Multi-scheme find-and-replace, including regex; schemes can be imported and exported

QUALITY

• Statistics for character count, CPS, and line count, with threshold highlighting

WORKFLOW

• Preview before export

• Pin 4 tools in the bottom bar; the rest stay in More

• Encoding: Auto, UTF-8, Simplified Chinese GB18030, Traditional Chinese Big5, Western, and Japanese

Local processing. One-time unlock. Open the file and get to work.