Sync subtitles online in seconds
Subtitle timing issues? Fix them instantly with Matesub.
Our powerful subtitle synchronizer lets you auto sync subtitles online, shift timing manually, and preview results in real time. No downloads, no editing software: just fast, accurate subtitle syncing in your browser.
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How to sync subtitles easily
- Upload your video or subtitle file
Easily upload your video or supported subtitle formats (.srt, .vtt, etc.) to get started instantly. - Choose auto sync or manual subtitle shifting
Click the AI auto-generation button to automatically sync subtitles with audio. - Preview in real time
Check the alignment live in your browser, see exactly how your synced subtitles will look before exporting. - Download your perfectly timed subtitles Once everything matches perfectly, download your synced subtitles ready to use on any platform.
Why choose Matesub’s subtitle synchronizer
Matesub’s subtitle synchronizer is engineered to adapt to any content, language or timing challenge. Our AI automatically analyzes the speech in your video to detect mismatches and apply accurate time adjustments to your subtitles. You can also manually shift subtitles by adding or subtracting seconds, allowing you to fix any delay or advance. From fast-paced conversations to rhythm-based music videos, Matesub ensures that your subtitles follow every word and beat with perfect alignment.
Key features
We handle both manual and automatic subtitle sync, making it easy to:
• Fix subtitles that are out of sync with video or audio.
• Shift subtitle tracks forward/backward (using our subtitle shifter).
• Align subtitles perfectly to speech or music cues.
• Support right-to-left (RTL) languages and complex character sets.
Whether you’re syncing English captions to a music video or adjusting German subtitles on a film, Matesub lets you sync subtitles accurately, automatically, and online in over 200 languages.
From Arabic to Spanish, Japanese to Portuguese, Matesub ensures your subtitles are always on time.
Subtitle synchronization in 200+ languages
en-GB
English (GB)
en-US
English (USA)
en-CA
English (Canada)
en-AU
English (Australia)
fr-FR
French
es-ES
Spanish
es-MX
Spanish (Mexico)
es-CO
Spanish (Colombia)
de-DE
German
de-AT
German (Austria)
de-AT
German (Austria)
nl-BE
Dutch
pt-PT
Portuguese
pt-BR
Portuguese (Brazil)
it-IT
Italian
pl-PL
Polish
el-GR
Greek
zh-CN
Chinese (Simplified)
zh-HK
Chinese (Hong Kong)
F.A.Q. — Subtitle synchronization
Matesub analyzes your video’s audio and auto-adjusts subtitle timing using speech recognition. You can use Matesub’s subtitle synchronizer to shift your subtitles forward or backward until they match the video. Simply upload your subtitle file and video, and adjust timing manually — or use our auto sync tool to align everything in seconds. Matesub works 100% online. You don’t need to download or install anything. Yes. Our AI-powered engine can sync subtitles automatically by detecting audio cues and matching them to the subtitle lines. This is perfect when you don’t want to manually adjust timestamps or you’re short on time. Matesub uses advanced AI technology to provide highly accurate subtitle synchronization. While the AI is precise, we also offer a subtitle editor so you can make adjustments if needed to ensure the subtitles perfectly match your video. Yes, Matesub supports online sub syncing in over 200 languages. Whether you need to sync English, German, Japanese, or Arabic subtitles, we make sure your captions stay in perfect sync — no matter the language. Don’t let bad timing ruin your subtitles.
Try the fastest, most accurate online subtitle synchronizer and make your subtitles perfectly on time, automatically or manually.
How do I sync subtitles automatically?
Is this tool free and online?
Is there a way to sync subtitles automatically?
Can I sync subtitles to music or fast dialogue?
Does Matesub support syncing subtitles in different languages?
Sync your subtitles online in seconds. Start now.