Release v1.2 — Native Client-Side Engine

Professional Subtitle Engineering & Translation Platform

Complete suite of private, fast, and free tools for translators, creators, and film lovers: smart dialogue translation, lossless SRT ↔ WebVTT conversion, millisecond sync, and Unicode RTL punctuation calibration.

Absolute Privacy

Your subtitles and media never touch an external server; all execution occurs inside your local browser memory (RAM).

Blazing Fast Performance

Convert, shift, and repair thousands of dialogue cues in milliseconds using native browser execution without software installation.

Universal Player Compatibility

Eliminate inverted punctuation and misplaced question marks in RTL scripts following international Unicode BiDi standards.

Smart Subtitle Translator

Translate subtitle dialogues accurately into your chosen language with millisecond-exact timing, preserved tags, and automatic RTL punctuation calibration.

Drop your SRT or WebVTT file here, or click to browse

SRT VTT TXT Supports .srt, .vtt and .txt files

Source Language:

Target Language:

Auto-apply RTL punctuation fixes for right-to-left target languages Normalize Arabic characters (ي/ك) to Persian

Input Subtitle:

0 cues detected

Translated Output:

Ready to translate

AI Workflow (ChatGPT / Claude / DeepL): To translate with an external LLM, click "Export for AI" to extract clean dialogues. Translate them in your AI model, paste the result into the output box, and click "Re-align AI with Timecodes" to match original timestamps.

Lossless SRT ↔ WebVTT Converter

Bidirectional standards-compliant conversion between SubRip (.srt) and W3C WebVTT (.vtt) with complete player compatibility.

Drop your SRT or VTT file here, or click to browse

Supports .srt, .vtt and .txt files

Input Subtitle:

Converted Output:

Time Calibration & FPS Synchronization

Fine-tune subtitle timing offset by milliseconds or calibrate frame rates (FPS) across different video releases.

Source Subtitle:

Synchronization Settings: TIMECODE ENGINE

Time Shift Offset (milliseconds):

Frame Rate Conversion (FPS):

RTL Typography & Encoding Recovery Studio

Permanently resolve inverted punctuation marks in Persian/Arabic subtitles via Unicode RLM injection, and repair garbled legacy Windows-1256 encodings to valid UTF-8 by analyzing raw file bytes.

To repair garbled Windows-1256 encoding, drop the original file here

Reads authentic binary bytes directly without clipboard corruption

Subtitle with Punctuation Jumps or Corrupt Encoding:

Smart Typography Adjustments: BIDI STUDIO

Fix trailing punctuation jumping to start of lines (RLM) Fix lines starting with numbers or Latin words Normalize Arabic letters (ك/ي) to Persian standard (ک/ی) Convert English digits to Persian digits (۱۲۳) Physical punctuation swapping (for legacy TV players)

Subtitle Merge & Split Tool

Seamlessly combine multi-disc subtitles (CD1 & CD2) with calibrated time offsets and automated cue renumbering without modifying source files.

Part 1 (CD1):

Part 2 (CD2):

Merged Output (Preview & Download):

Part 2 Start Offset (ms):

High-Speed Batch Processing with ZIP Archive

Convert formats or repair RTL punctuation across dozens of subtitle files simultaneously, packaged into a clean ZIP archive.

Drop multiple subtitle files here (batch selection supported)

Supports .srt, .vtt and .txt files

Batch Operation: