Subtitle Splitter
Break large subtitle files into smaller parts. Split by number of cues, equal parts, or at a specific timestamp.
Drag & drop your subtitle file here
Drag and drop subtitle files here or click to browse
Key Features
Engineered for video editors and localization teams. Helps enforce common subtitle timing rules and formatting.
Subtitle Splitter Live Execution Demo
In-Memory Processing
File parsing, mutations, and time shifts for standard tools run in browser memory without sending subtitle files to our servers.
Millisecond Precision
Millisecond-accurate timecode parsing and arithmetic prevent synchronization drift across desktop and web players.
Fault-Tolerant Engine
Automatic multi-encoding detection and syntax sanitization gracefully handle malformed cues and unexpected linebreaks.
Common Use Cases
Real-world scenarios across video post-production, course transcription, and global localization.
Multi-Part Episodes
Split a subtitle file for multi-part episodes or CD-based movie rips that need separate subtitle files per part.
File Size Limits
Break large subtitle files to fit within file size or cue limits imposed by some platforms or players.
Chapter-Based Splitting
Split subtitles at a specific time point to match chapter breaks or scene transitions.
Batch Processing
Split a long subtitle into smaller chunks for easier editing, proofreading, or review by multiple team members.
Social Media Clips
Extract a portion of subtitles for short clips, trailers, or promotional content by splitting at the desired time.
Translation Workflow
Divide subtitles into manageable segments for translation teams working in parallel.
How It Works
Streamlined end-to-end processing pipeline engineered for speed and precision.
Upload & Import
Select your subtitle file.
Choose a split mode
by cue count, by number of parts, or at a time point.
Configuration
Set the split parameters (number of cues, parts, or timestamp).
Processing
Click Split and download the individual parts or all as a ZIP.
Why Choose AllSubConverter?
Client-Side Privacy
Standard tools run in your browser so standard files are not uploaded to our servers.
Fast Local Parsing
Optimized processing engine parses and converts files directly in your browser.
Generous Batches
Up to 50 MB per file, 200 files or 1 GB total per batch.
Universal Compatibility
Runs in modern browsers across Windows, macOS, Linux, iOS, and Android.
More Subtitle Tools
Frequently Asked Questions
It divides a single subtitle file into multiple smaller files. You can split by a fixed number of cues per file, by a target number of equal parts, or at a specific timestamp.
If you choose 3 parts, the file is divided as evenly as possible into 3 parts. Cue counts are balanced using ceiling division, so some parts may have one more cue than others.
Yes. Each output part has its cues renumbered sequentially starting from 1, regardless of the original numbering.
If you set 500 cues per file and your file has 1200 cues, the splitter creates 3 files: part 1 (cues 1-500), part 2 (cues 501-1000), and part 3 (cues 1001-1200). Each part is renumbered starting from 1.
The splitter finds the first cue whose start time is at or after the specified timestamp. All cues before that point go into part 1, and the rest go into part 2.
Yes. When the split produces multiple parts, you can download all of them as a single ZIP file, or download each part individually.
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