Sinhala caption generator: generate Sinhala subtitles online

Last updated: 3 October 2026 · AutocaptionsLK, Sri Lanka

Upload a video or audio file and generate Sinhala captions without installing anything. You get Unicode SRT, VTT and TXT subtitle files (plus FM Abhaya) for CapCut, Adobe Premiere, YouTube and desktop players.

Generate Sinhala captions in your browser

You do not need a desktop transcription program or a plugin. AutocaptionsLK takes one video or audio file, recognises the Sinhala speech, cleans up the text and gives you subtitle files you can drop into the editor you already use.

1. Enter your activation key and check your remaining minutes on the upload panel.
2. Upload one file — MP4, MOV, MKV, WEBM or AVI video, or MP3, WAV, M4A, AAC, OGG audio, up to 150 MB and 15 minutes.
3. Generate, review, download. Fix names and punctuation, then download SRT, VTT, TXT (Unicode and FM Abhaya) or the ready-made zip. Your upload is deleted once the captions are ready.

What you can do with the Sinhala subtitle files

• CapCut (Desktop and Web): import the Unicode SRT as subtitles, then style the text — step-by-step CapCut guide.
• Adobe Premiere Pro: import the SRT as media and drag it into your sequence to create a caption track (Adobe documentation).
• YouTube and other platforms: upload the SRT as a caption file where the platform accepts subtitle uploads.
• VLC and desktop players: load the subtitle file next to your video for quick review.
• Social apps: many mobile editors only accept text or their own caption tools, so check the app before assuming an SRT import exists.

Unicode or FM Abhaya — which Sinhala subtitle file do I need?

Use Unicode for anything modern: CapCut, Adobe Premiere, YouTube, VLC, subtitle editors and web players. Use FM Abhaya only for older Sinhala subtitle software that expects that legacy font — FM Abhaya text looks like Latin letters unless the font itself is installed, which is expected behaviour, not a broken file.

Accuracy: what to expect from automatic Sinhala captions

Automatic speech recognition is a starting point. Clear, single-speaker audio produces usable captions; heavy background music, several speakers talking over each other, poor phone audio or strong dialect reduce quality. Always review the draft and correct proper nouns, numbers and punctuation before publishing.

Nothing is perfect: expect to spend a few minutes editing the text. That editing time is still far shorter than typing every line yourself.

Upload limits and how minutes are counted

• One file at a time, up to 150 MB and 15 minutes per file.
• Billing uses decoded audio duration rounded up to the whole second, per successful file — not the time you spend on the website.
• Failed jobs return their reserved credit automatically.
• Activation keys have no calendar expiry; availability depends on the service.
• You can buy several packages and use the minutes across different videos.

A longer package does not raise the 15-minute per-file upload limit. Split a long recording into parts if it exceeds the limit.

Sinhala caption packages

Prepaid packages in Sri Lankan rupees. Payment is confirmed on WhatsApp and a private activation key is issued for the minutes you bought.

One-time minute packages, not monthly subscriptions. Usage is based on decoded audio duration, rounded up to a whole second per file. Failed jobs return their reserved credits, while completed jobs use them. Activation keys have no calendar expiry, but availability depends on the service. Purchases are arranged manually on WhatsApp and packages are non-refundable except where required by law — read the refund policy first.

සිංහල උපසිරැසි ජනනය කරන්න

ඔබේ වීඩියෝව හෝ ශ්‍රව්‍ය ගොනුව උඩුගත කර, සිංහල උපසිරැසි ස්වයංක්‍රීයව ජනනය කරගන්න. Unicode SRT, VTT සහ TXT ගොනු CapCut, Premiere හෝ YouTube සඳහා බාගත කරගන්න. උඩුගත කළ ගොනුව උපසිරැසි සූදානම් වූ පසු ඉවත් කෙරේ.

ගොනුවක් සඳහා උපරිම ප්‍රමාණය 150 MB සහ උපරිම කාලය මිනිත්තු 15 කි. ගෙවීම WhatsApp හරහා තහවුරු කර, ක්‍රියාකාරී key එකක් ලබාගන්න.

Frequently asked questions