Rapporteer bug / feature request

Gratis Subtitle Converter

Converteren tussen SRT, VTT, SSA/ASS, SBV, TXT en JSON ondertitel formaten direct. 100% client-side -- je bestanden verlaten nooit je browser.

Plaats hier uw ondertitel bestand of klik om te bladeren

SRT, VTT, ASS, SSA, SBV, TXT, JSON

Cuesunit synonyms for matching user input
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Converted Output 

          

        

      


      
      

        
Info over ondertitelformaten

        

          

            

              
SRT (SubRip)

              
Het meest gebruikte ondertitel formaat. Compatibel met vrijwel alle mediaspelers en videoplatforms. Gebruikt door komma's gescheiden milliseconden (HH:MM:SS,mmm).

            

          

          

            

              
VTT (WebVTT)

              
Web Video Text Tracks formaat. Ontworpen voor HTML5 video en ondersteund door alle moderne browsers. Gebruikt punt-gescheiden milliseconden (HH:MM:SS.mmm).

            

          

          

            

              
ASS / SSA (Substation Alpha)

              
Ondersteunt rijke styling, positionering, karaoke effecten, en geavanceerde typografie. Populair in anime fansubs en complexe ondertiteling producties.

            

          

          

            

              
SBV (YouTube SubViewer)

              
SubViewer formaat gebruikt door YouTube. Eenvoudige tijdstempel formaat ideaal voor video platform uploads en basis bijschriften.

            

          

        


        
Ondertiteling omzetten

        

          

            

              
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Uploaden of plakken

              
Laat uw ondertitelingbestand vallen of plak de inhoud direct in de editor.

            

          

          

            

              
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Kies het uitvoerformaat

              
Het invoerformaat wordt automatisch gedetecteerd. Selecteer het gewenste uitvoerformaat uit de dropdown.

            

          

          

            

              
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& Downloaden converteren

              
Klik op Converteren om het voorbeeld te zien, download dan het bestand of kopieer naar het klembord.

            

          

        

      

    

  







    

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Veelgestelde vragen


        

        

            
            

                

                
subtitle conversion runs in your browser: paste a URL, upload a file, or record from your mic. STT.ai picks the AI model and returns the transcript in under 5 minutes. Export as TXT, SRT, VTT, DOCX, JSON, or PDF.

            

            
            

                

                
Yes — every visitor gets 600 free minutes/month on STT.ai, usable for subtitle conversion the same as any other workflow. Paid plans starting at $5/month unlock longer files, private transcripts, and priority queueing.

            

            
            

                

                
subtitle conversion runs on the same AI models as the rest of STT.ai — our best models reach 95-97% accuracy on clean speech (3-5% Word Error Rate on benchmarks). Switch models on the fly if the first pass is below your target.

            

            
            

                

                
subtitle conversion can run on any of STT.ai's 10+ models — STT.ai Enhanced (most accurate), Whisper Large V3 (99 languages), NVIDIA Canary (#1 WER on supported langs), Whisper Turbo (fast), Moonshine (lightweight), and more.

            

            
            

                

                
Yes. Every transcript exports as SRT or VTT — works with YouTube, Vimeo, TikTok, VLC, and every major video player. The burn-subtitles tool overlays them onto video as hardsubs.

            

            
            

                

                
Yes. Speaker diarization automatically labels each voice (Speaker 1, Speaker 2, ...) and you can rename them in the built-in editor. Works across all models and languages.

            

            
            

                

                
Most subtitle conversion jobs finish in under 5 minutes. A 1-hour audio file typically completes in 2-3 minutes with our fastest models. Speed depends on chosen model and current GPU load.

            

            
            

                

                
subtitle conversion accepts 20+ formats — MP3, WAV, M4A, FLAC, OGG, MP4, MKV, MOV, WebM, AVI, and more. Output to TXT, SRT, VTT, DOCX, JSON, or PDF.

            

            
            

                

                
Yes. Audio files submitted to subtitle conversion are processed and deleted by default. Pro plans add client-side encryption — even if STT.ai's database is breached, your transcripts are unreadable without your key. Data is never used for model training without explicit opt-in.

            

            
            

                

                
Yes. STT.ai offers a REST API with Python and Node.js SDKs, plus an MCP server for Claude and Cursor — all usable for subtitle conversion workflows. Free API tier includes 100 minutes/month.

            

            
            

                

                
Yes. Every transcript opens in the built-in editor where you can correct words, rename speakers, adjust timestamps, and add notes. All changes save automatically.

            

            
            

                

                
Every transcript gets a unique shareable URL. Export to DOCX or PDF for email. Pro plans add password-protected and permanent links — useful for client work.

            

            
            

                

                
STT.ai handles 1,300+ platforms including YouTube, Vimeo, TikTok, SoundCloud, Zoom, Google Meet, podcast hosts, and more. URL transcription works with publicly-available content only — DRM-protected sources can't be transcribed.