Proper comma timestamp separators (not dots), sequential numbering, correct CRLF line endings, and UTF-8 encoding. Our SRT files work everywhere because they follow the SubRip specification exactly.
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The SRT format is just numbered blocks with timestamps and text — but the details matter. Timestamps use commas for milliseconds (00:01:23,456), not dots. Line endings should be CRLF. Sequence numbers must be consecutive. Subtitle lines should stay under 42 characters for broadcast or 68 for streaming. Reading speed should be 15-20 characters per second. And non-Latin scripts need UTF-8 with BOM to display correctly on many players. Vocova generates SRT files that handle all of this correctly.
Drag and drop any media file. We accept all common formats — MP4, MP3, MOV, WAV, MKV, AVI, WebM, M4A, and dozens more.
Speech is transcribed, then segmented into subtitle blocks with proper timing, line lengths, and reading speed. Each block follows the SubRip specification exactly.
Preview each subtitle block, edit text or timing if needed, and download the SRT file ready for any platform or editor.
SRT uses commas to separate milliseconds (00:01:23,456), not dots. This is the most common error in SRT files found online — many tools output dots, which causes parsing failures in strict players. Our files always use the correct comma separator.
Broadcast standards require a maximum of 42 characters per line (CPL). Streaming platforms like Netflix allow up to 68 CPL. We segment subtitle text to fit within appropriate line length limits, ensuring your subtitles don't overflow or get truncated on any screen.
Subtitles that appear and disappear too quickly are useless. We target 15-20 characters per second — the range established by broadcast research for comfortable reading. Longer subtitle blocks get more display time proportional to their character count.
SRT files for Arabic, Chinese, Japanese, Korean, Thai, Hindi, and other non-Latin scripts need UTF-8 encoding with a Byte Order Mark (BOM) to display correctly in many media players and platforms. We include the BOM automatically when the transcript contains non-Latin characters.
Each SRT block needs a sequential number starting from 1, incrementing by 1 for each block. Sounds trivial, but SRT files with gaps in numbering, duplicate numbers, or starting from 0 cause issues in some editors and platforms. Ours are always clean.
YouTube, Vimeo, and most streaming platforms accept SRT files for subtitles. Our files pass their validation because the formatting is correct — proper commas, proper numbering, proper encoding. No upload errors or malformed subtitle warnings.
Premiere Pro, Final Cut Pro, DaVinci Resolve, Avid, and CapCut all import SRT files. Properly formatted SRT files import cleanly with correct timing — badly formatted ones cause misaligned subtitles or import failures.
Broadcast delivery requires subtitles within specific CPL limits and reading speeds. Our SRT files respect these constraints, making them suitable as a starting point for broadcast caption workflows.
SRT is the most widely accepted caption format for WCAG, ADA, and Section 508 compliance. Generate SRT files from your video content and add them to your media to meet accessibility requirements.
Import properly formatted SRT files directly into Premiere Pro, Final Cut, DaVinci Resolve, or Avid. No need to fix malformed timestamps or re-number subtitle blocks before editing.
Replace YouTube's error-prone auto-captions with accurate SRT files. Upload alongside your video for captions that actually match what was said.
Generate SRT files that meet Netflix, Amazon, and platform-specific subtitle requirements including CPL limits and reading speed guidelines.
Start with an accurate SRT in the original language, then translate it. Proper segmentation and timing make translation work faster because the subtitle breaks already make linguistic sense.
Add captions to training videos, onboarding materials, and course content. SRT files work with virtually every LMS and video hosting platform.
The SubRip specification uses commas as the decimal separator for milliseconds (00:01:23,456). This follows European numeric conventions, since the format originated from the French SubRip software. Many tools incorrectly use dots, which causes parsing errors in strict SRT parsers. Our files always use the correct comma separator.
Broadcast standards (BBC, EBU) typically require a maximum of 37-42 characters per line. Netflix allows up to 42 CPL for most languages. YouTube and other web platforms are more lenient — around 68 CPL. We default to a safe limit that works across platforms, keeping lines readable on any screen size.
The SRT file must be UTF-8 encoded with a BOM (Byte Order Mark) at the beginning. Without the BOM, many players default to ASCII or Windows-1252 encoding, which garbles non-Latin characters. We automatically add the BOM when your transcript contains non-Latin text.
The original SubRip format does not support styling natively. Some players interpret basic HTML tags (<b>, <i>, <u>) embedded in the text, but support is inconsistent. VLC and many modern players handle it; others show the raw tags as text. For reliable styling, use WebVTT instead, which has proper CSS support through the ::cue pseudo-element.
Some SRT parsers use sequence numbers to validate file structure and detect corruption. Files with gaps (1, 3, 4), duplicates (1, 2, 2, 3), or starting from 0 can cause import failures or missing subtitles in Premiere Pro, DaVinci Resolve, and certain online platforms. We generate clean sequential numbering from 1.
The most frequent issues: using dots instead of commas in timestamps, UTF-8 without BOM for non-Latin text, extra blank lines between blocks (causes empty ghost subtitles), missing sequence numbers, timestamps that overlap (end time of one block after start time of next), and LF line endings on Windows players that expect CRLF. Our files avoid all of these.
SRT files are for pre-recorded content — they're static files with fixed timestamps. For live streaming with HLS or DASH, you need WebVTT segments. However, you can generate an SRT file from a recording of a live stream after the fact for VOD (video on demand) replays.
The standard is a maximum of two lines per subtitle block. Some platforms allow three lines for accessibility captions, but two lines is the safe maximum. We segment speech into blocks that fit within two lines at the appropriate CPL limit, with natural language breaks — never splitting a subtitle in the middle of a phrase.
Generate WebVTT subtitles for HTML5 video and HLS streaming
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