Your subtitles.
Sorted.
Convert, edit, and manage subtitle files right in your browser. No uploads, no sign-up, no waiting.
All Tools
Choose a tool to get started with your subtitle files
Most Popular
Universal Converter
Convert between all subtitle formats (SRT, VTT, ASS, SSA, SBV, SUB)
FPS Converter
Convert subtitle timing between different frame rates (23.976, 25, 29.97, 30 fps)
Shift Subtitles
Shift all subtitle timestamps forward or backward by a fixed amount
Merge Subtitles
Combine multiple subtitle files into one document
SRT to Text
Extract plain text from subtitle files, removing timestamps
ASS to SRT
Convert SubStation Alpha (.ass) subtitles to SubRip (.srt) format
Text to SRT
Create subtitle files from plain text with automatic timing
Convert subtitles between any format
Universal Converter
Convert between all subtitle formats (SRT, VTT, ASS, SSA, SBV, SUB)
SRT to Text
Extract plain text from subtitle files, removing timestamps
ASS to SRT
Convert SubStation Alpha (.ass) subtitles to SubRip (.srt) format
Text to SRT
Create subtitle files from plain text with automatic timing
SRT to VTT
Convert SubRip (.srt) subtitles to WebVTT (.vtt) format
VTT to SRT
Convert WebVTT (.vtt) subtitles to SubRip (.srt) format
SRT to ASS
Convert SubRip (.srt) subtitles to Advanced SubStation Alpha (.ass) format
VTT to ASS
Convert WebVTT (.vtt) subtitles to Advanced SubStation Alpha (.ass) format
SBV to SRT
Convert YouTube SBV subtitles to SubRip (.srt) format
SUB to SRT Converter
Convert SUB/IDX (DVD) subtitles to SRT format instantly
TTML to SRT Converter
Convert TTML (Timed Text Markup Language) to SRT format
SRT to TTML Converter
Convert SRT to TTML (Timed Text Markup Language) format
Convert to SRT
Convert any subtitle format to SubRip (.srt) format
Convert to VTT
Convert any subtitle format to WebVTT (.vtt) format
SMI to SRT
Convert SAMI (.smi) subtitle files to SubRip (.srt) format
ASS to VTT
Convert Advanced SubStation Alpha (.ass/.ssa) subtitle files to WebVTT (.vtt) format
VTT to Text
Extract plain text from WebVTT subtitle files, removing timecodes and cue settings
SRT to SMI Converter
Convert SubRip .srt subtitle files to SAMI .smi format, the HTML-like Microsoft subtitle format widely used by Korean media players and Windows Media Player.
ASS to SMI Converter
Convert Advanced SubStation Alpha .ass or .ssa subtitle files to SAMI .smi format, stripping complex effects while preserving timing and dialogue for Korean media players and Windows Media Player.
VTT to SMI Converter
Convert WebVTT .vtt subtitle files to SAMI .smi format, the HTML-like Microsoft subtitle format standard in Korean media culture and natively supported by Windows Media Player.
TXT to SRT
Drop a .txt transcript file and download a timed .srt
ASS to TXT Converter
Convert ASS subtitles to TXT instantly in your browser.
LRC to SRT Converter
Convert LRC subtitles to SRT instantly in your browser.
SBV to VTT Converter
Convert SBV subtitles to VTT instantly in your browser.
SUB to VTT Converter
Convert SUB subtitles to VTT instantly in your browser.
SMI to VTT Converter
Convert SMI subtitles to VTT instantly in your browser.
LRC to VTT Converter
Convert LRC subtitles to VTT instantly in your browser.
TTML to VTT Converter
Convert TTML subtitles to VTT instantly in your browser.
SBV to ASS Converter
Convert SBV subtitles to ASS instantly in your browser.
SUB to ASS Converter
Convert SUB subtitles to ASS instantly in your browser.
SMI to ASS Converter
Convert SMI subtitles to ASS instantly in your browser.
LRC to ASS Converter
Convert LRC subtitles to ASS instantly in your browser.
TTML to ASS Converter
Convert TTML subtitles to ASS instantly in your browser.
SRT to SBV Converter
Convert SRT subtitles to SBV instantly in your browser.
VTT to SBV Converter
Convert VTT subtitles to SBV instantly in your browser.
ASS to SBV Converter
Convert ASS subtitles to SBV instantly in your browser.
SUB to SBV Converter
Convert SUB subtitles to SBV instantly in your browser.
SMI to SBV Converter
Convert SMI subtitles to SBV instantly in your browser.
LRC to SBV Converter
Convert LRC subtitles to SBV instantly in your browser.
TTML to SBV Converter
Convert TTML subtitles to SBV instantly in your browser.
SRT to SUB Converter
Convert SRT subtitles to SUB instantly in your browser.
VTT to SUB Converter
Convert VTT subtitles to SUB instantly in your browser.
ASS to SUB Converter
Convert ASS subtitles to SUB instantly in your browser.
SBV to SUB Converter
Convert SBV subtitles to SUB instantly in your browser.
SMI to SUB Converter
Convert SMI subtitles to SUB instantly in your browser.
LRC to SUB Converter
Convert LRC subtitles to SUB instantly in your browser.
TTML to SUB Converter
Convert TTML subtitles to SUB instantly in your browser.
SBV to SMI Converter
Convert SBV subtitles to SMI instantly in your browser.
SUB to SMI Converter
Convert SUB subtitles to SMI instantly in your browser.
LRC to SMI Converter
Convert LRC subtitles to SMI instantly in your browser.
TTML to SMI Converter
Convert TTML subtitles to SMI instantly in your browser.
SRT to LRC Converter
Convert SRT subtitles to LRC instantly in your browser.
VTT to LRC Converter
Convert VTT subtitles to LRC instantly in your browser.
ASS to LRC Converter
Convert ASS subtitles to LRC instantly in your browser.
SBV to LRC Converter
Convert SBV subtitles to LRC instantly in your browser.
SUB to LRC Converter
Convert SUB subtitles to LRC instantly in your browser.
SMI to LRC Converter
Convert SMI subtitles to LRC instantly in your browser.
TTML to LRC Converter
Convert TTML subtitles to LRC instantly in your browser.
VTT to TTML Converter
Convert VTT subtitles to TTML instantly in your browser.
ASS to TTML Converter
Convert ASS subtitles to TTML instantly in your browser.
SBV to TTML Converter
Convert SBV subtitles to TTML instantly in your browser.
SUB to TTML Converter
Convert SUB subtitles to TTML instantly in your browser.
SMI to TTML Converter
Convert SMI subtitles to TTML instantly in your browser.
LRC to TTML Converter
Convert LRC subtitles to TTML instantly in your browser.
SBV to TXT Converter
Convert SBV subtitles to TXT instantly in your browser.
SUB to TXT Converter
Convert SUB subtitles to TXT instantly in your browser.
SMI to TXT Converter
Convert SMI subtitles to TXT instantly in your browser.
LRC to TXT Converter
Convert LRC subtitles to TXT instantly in your browser.
TTML to TXT Converter
Convert TTML subtitles to TXT instantly in your browser.
SRT to JSON Converter
Convert SRT subtitles to JSON instantly in your browser.
VTT to JSON Converter
Convert VTT subtitles to JSON instantly in your browser.
ASS to JSON Converter
Convert ASS subtitles to JSON instantly in your browser.
SRT to CSV Converter
Convert SRT subtitles to CSV instantly in your browser.
VTT to CSV Converter
Convert VTT subtitles to CSV instantly in your browser.
ASS to CSV Converter
Convert ASS subtitles to CSV instantly in your browser.
SRT to PDF Converter
Convert SRT subtitles to PDF instantly in your browser.
VTT to PDF Converter
Convert VTT subtitles to PDF instantly in your browser.
ASS to PDF Converter
Convert ASS subtitles to PDF instantly in your browser.
TTML to JSON Converter
Convert TTML subtitles to JSON instantly in your browser.
TTML to CSV Converter
Convert TTML subtitles to CSV instantly in your browser.
TTML to PDF Converter
Convert TTML subtitles to PDF instantly in your browser.
SMI to JSON Converter
Convert SMI subtitles to JSON instantly in your browser.
SMI to CSV Converter
Convert SMI subtitles to CSV instantly in your browser.
SMI to PDF Converter
Convert SMI subtitles to PDF instantly in your browser.
LRC to JSON Converter
Convert LRC subtitles to JSON instantly in your browser.
LRC to CSV Converter
Convert LRC subtitles to CSV instantly in your browser.
LRC to PDF Converter
Convert LRC subtitles to PDF instantly in your browser.
SBV to JSON Converter
Convert SBV subtitles to JSON instantly in your browser.
SBV to CSV Converter
Convert SBV subtitles to CSV instantly in your browser.
SBV to PDF Converter
Convert SBV subtitles to PDF instantly in your browser.
SUB to JSON Converter
Convert SUB subtitles to JSON instantly in your browser.
SUB to CSV Converter
Convert SUB subtitles to CSV instantly in your browser.
SUB to PDF Converter
Convert SUB subtitles to PDF instantly in your browser.
Subtitle to ASS Converter
Convert any subtitle file to ASS online, free, private, and entirely in your browser.
Subtitle to TXT Converter
Convert any subtitle file to TXT online, free, private, and entirely in your browser.
Subtitle to TTML Converter
Convert any subtitle file to TTML online, free, private, and entirely in your browser.
Subtitle to LRC Converter
Convert any subtitle file to LRC online, free, private, and entirely in your browser.
Subtitle to SBV Converter
Convert any subtitle file to SBV online, free, private, and entirely in your browser.
Subtitle to SUB Converter
Convert any subtitle file to SUB online, free, private, and entirely in your browser.
Subtitle to SMI Converter
Convert any subtitle file to SMI online, free, private, and entirely in your browser.
Subtitle to JSON Converter
Convert any subtitle file to JSON online, free, private, and entirely in your browser.
Subtitle to CSV Converter
Convert any subtitle file to CSV online, free, private, and entirely in your browser.
Pull subtitle tracks out of video, DVD, and Blu-ray files
VobSub to SRT Converter
Convert VobSub (.idx/.sub) DVD image subtitles to SRT with OCR
Extract Subtitles from Video
Extract embedded subtitles from MP4, MKV and other video files to SRT or VTT
MP4 to SRT: Extract Subtitles from MP4
Extract embedded subtitle tracks from MP4 video files and download as SRT or VTT
MKV to SRT: Extract Subtitles from MKV
Extract embedded subtitle tracks from MKV video files and download as SRT or VTT
SUP to SRT Converter
Convert Blu-ray PGS (.sup) subtitles to editable SRT with in-browser OCR
PGS to SRT Converter
Convert Blu-ray PGS subtitles to editable SRT with in-browser OCR
MKV to VTT: Extract Subtitles from MKV to WebVTT
Extract embedded subtitle tracks from MKV video files and download as VTT (WebVTT) for web players
MP4 to VTT: Extract Subtitles from MP4 to WebVTT
Extract embedded subtitle tracks from MP4 video files and download as VTT (WebVTT) for web players
MKS to SRT: Convert Matroska Subtitle Files to SRT
Extract subtitle tracks from MKS (Matroska subtitle sidecar) files and download as SRT or VTT
Generate subtitles from speech, in your browser
Video to Text: Free In-Browser Transcription
Transcribe video to text free, right in your browser, no upload, no signup. Your video stays on your device. Supports MP4, MKV, MOV, WebM. Download as SRT, VTT, or TXT.
Transcribe Video to Text: Free, Private, Instant
Transcribe any video to text free, right in your browser. Zero uploads, audio is processed entirely on your device. SRT, VTT, or plain text output.
Audio to SRT: Generate Subtitles from Audio Files
Convert audio files to SRT subtitles in your browser. Free, no upload, supports MP3, WAV, M4A, FLAC, OGG, Opus. Download timed SRT instantly.
Generate Subtitles: Auto-Generate from Video or Audio
Generate subtitles automatically from any video or audio file, free, private, in-browser. 22 languages, files up to 2 GB. Export SRT, VTT + 8 more formats.
MP4 to Text: Transcribe MP4 Video Free
Transcribe MP4 files to text or SRT subtitles in your browser. Free, private, no upload. Works with MP4, MOV, MKV and all major video formats.
Audio to Text: Free AI Transcription in Your Browser
Transcribe audio to text free, MP3, WAV, M4A, voice memos, podcasts. Runs in your browser, nothing uploaded. Download the transcript as TXT or subtitles.
Shift, merge, split, and re-time subtitles
FPS Converter
Convert subtitle timing between different frame rates (23.976, 25, 29.97, 30 fps)
Shift Subtitles
Shift all subtitle timestamps forward or backward by a fixed amount
Merge Subtitles
Combine multiple subtitle files into one document
Split Subtitles
Extract time ranges or split subtitle files into multiple documents
Subtitle Translator
Translate subtitle files into 100+ languages, free, fast, and no sign-up.
Resync Subtitles
Automatically detect and fix out-of-sync subtitle timing against your video's audio
Speed Adjustment
Adjust subtitle timing for sped-up or slowed-down videos
AI LRC Editor: Sync Lyrics Automatically
Paste your lyrics, drop an audio or video file, and get every line timestamped automatically, free, unlimited, and 100% in your browser.
SRT to MP3 Converter with Free AI Voice Narration
Convert your SRT subtitle file into an MP3 narration with a natural AI voice. Free, unlimited, and online. No sign-up, no watermark, no converter to install.
Subtitles to Audio with AI Narration in Your Browser
Turn any subtitle file into narrated audio with a natural AI voice. Free, unlimited, and online. Every cue is read aloud and synced to its timing.
SRT to Audio Converter with a Free AI Voice
Convert an SRT subtitle file into spoken audio with a natural AI voice, and choose the format: MP3, M4A, or WAV. Free, unlimited, and no sign-up.
VTT to MP3 with a Free AI Voice for Web Captions
Convert a WebVTT caption file into a narrated MP3 with a natural AI voice. Free, unlimited, and online. No sign-up, no watermark, nothing to install.
Free Text to Speech with Natural AI Voices
Turn any text into natural-sounding speech and download it as MP3, M4A, or WAV. Free, unlimited, online, in 31 languages with 10 AI voices.
AI Voiceover Translation for Video
Translate your video's dialogue and generate a natural AI voiceover in a new language, right in your browser. Free AI dubbing, no watermark, no editing software.
Repair, clean, and re-encode subtitle files
Everything in your browser. Nothing on a server.
100% Browser-Based
All processing happens in your browser. No files uploaded to servers.
Secure & Private
Your subtitle files never leave your device. Complete privacy guaranteed.
Fast & Free
Instant processing with no waiting. Completely free, no limits or restrictions.
Frequently Asked Questions
Everything you need to know about subtitle conversion
What subtitle formats do you support?
SubtitleKit supports all major subtitle formats: SRT, VTT, ASS/SSA, SBV, SUB, and TTML. You can convert between any of these formats instantly in your browser.
Is my data safe? Where are files stored?
Privacy comes first. All conversions happen directly in your browser using JavaScript. Your files never leave your device and are never uploaded to any server. Nothing is stored - once you close the page, everything is gone.
Is SubtitleKit completely free?
Yes! SubtitleKit is 100% free with no hidden costs, subscriptions, or premium tiers. All features are available to everyone without creating an account or providing any personal information.
Can I convert multiple subtitle files at once?
Yes! Every tool supports batch processing. Simply select or drag and drop multiple files at once. Each file will be converted individually, and you can download them all together or one by one.
How fast is the conversion process?
Most subtitle conversions complete in under a second! Since processing happens in your browser using modern web technologies, there's no server upload/download time. Large files may take a few seconds depending on your device performance.
Can I use SubtitleKit offline?
After loading the page once, SubtitleKit works completely offline. All conversion logic runs in your browser, so you don't need an internet connection. Just keep the page open to continue converting subtitles.
Do I need to create an account?
No account needed! SubtitleKit works without any registration, login, or personal information. Just visit the site and start converting immediately.
What's the difference between SRT and VTT?
SRT is the classic, universally compatible format. VTT is the modern web standard with additional features like styling and positioning. For maximum compatibility, use SRT. For web videos with advanced styling, use VTT.