⏱️ Totally free • Professional timing

Sync Subtitles to Video with Frame-Level Precision

Totally free to use—no credit card, no trial limits for the sync workflow. Online subtitle sync and resync for SRT and VTT: align captions with your video, fix delay, and adjust timing with precision controls, real-time preview, and export.
Upload your subtitle file (VTT or SRT)
✨ Totally free ⚡ Real-time preview

Subtitle sync interface

Timeline editing, live preview, and export in one workspace—built for quick resync sessions after edits or drift.

Subtitle Sync Desktop Interface Subtitle Sync Mobile Interface

Everything for perfect timing

Totally free to use—use one workflow to sync subtitles online, resync subtitles after a re-edit or frame-rate change, and finish subtitle timing adjustment before export. Import existing captions, fine-tune every segment with frame-level control, and preview changes on your video in real time.

Frame-level timeline & sync with video

Nudge start and end times until dialogue and captions line up—ideal when the transcript is right but timings drift. After a heavy re-edit, shift blocks in bulk or fix delay and per-cue timing online so you catch issues before YouTube or social publish.

Real-time video preview

Live playback with subtitle overlay and instant feedback on every timing change—so placement and pacing stay accurate without guesswork.

Resync SRT & VTT, then export your way

Bring subtitles from SRT, VTT, or other common formats. Export subtitle files or embed soft or hard subtitles into video for the platform you need.

Fast workflow in the browser

No install—upload, adjust, and export in minutes. Intuitive controls keep subtitle synchronization moving whether you are fixing one reel or a full episode.

Also see: SRT editor online · Subtitle converter · RTL subtitle fixer

Why teams choose this subtitle sync tool

Accuracy, formats, and delivery options in one streamlined workflow—no juggling multiple apps.

Lightning-fast edits

Drag, nudge, and trim cues quickly—finish sync projects in minutes instead of hours.

Professional accuracy

Frame-level control for broadcast-ready timing and consistent quality.

Universal format support

Major subtitle formats in and out—works with common editors and platforms.

Custom styling

Typography, fonts, colors, and positioning for on-brand captions.

Seamless integration

Pairs with Subtitle Generator, multi-language workflows, and the rest of videodubbing.com.

Video embedding

Hard-sub or soft-sub exports for maximum playback compatibility.

Resync subtitles online in three steps

Fix drift, correct timing errors, or align captions after a video edit—no software to install. Upload, adjust on the timeline, then export.

Import video & subtitles

Upload your video and bring in SRT, VTT, or other subtitles—or start from subtitles you created in our Subtitle Generator.

Fine-tune timing

Use the precision timeline: drag segments, trim duration, and match dialogue with frame-level control.

Export & publish

Download SRT or VTT, or embed soft or hard subtitles—ready for any platform or editor.

🎯 Perfect For
Subtitle Sync Use Cases
Trusted by content professionals worldwide
Content Creators
Perfect timing for YouTube videos, social media content, and streaming platforms. Professional subtitles that enhance viewer engagement.
Educational Content
Ensure perfect timing for lectures, training videos, and course materials. Critical for accessibility and learning comprehension.
Professional Media
Meet broadcast standards with frame-perfect timing for films, documentaries, commercials, and professional video production.
🌟 Ready to Sync
Perfect Subtitle Timing Made Simple
Subtitle Sync is totally free to use in your browser. Join creators who rely on it for frame-perfect timing and professional results—start in seconds.
Upload your subtitle file (VTT or SRT)
Totally free • No credit card required • Frame-perfect precision