ari

.ariAegisub Advanced Subtitle Format

Aegisub Project · 2005

Developer
Aegisub Project
Category
Documents
MIME Type
text/vnd.aegisub.advanced-subtitle
First Released
2005
Open Format
Yes
File Signature
N/A (Plain text file, typically starts with [Script Info] or [Events])
At a Glance
.ari
Aegisub Advanced Subtitle Format

ARI is an advanced subtitle file format used by Aegisub for creating highly stylized and complex subtitles with detailed timing and effects.

Reviewed on July 1, 2026
Compression
Plain text
Transparency
N/A
Editability
High
Best for
Advanced styling

Key Features

  • Supports advanced styling for text, colors, and fonts.
  • Enables complex positioning and animation of subtitle elements.
  • Includes support for karaoke effects and timing.
  • Provides fine-grained control over subtitle timing and duration.

Best For

  • Advanced subtitle styling and effects.
  • Precise timing control for synchronization.
  • Creating karaoke or visually dynamic subtitles.
  • Projects requiring detailed subtitle customization.

Less Ideal For

  • Simple, unstyled subtitles (consider SRT).
  • Plain text document exchange.
  • Storing metadata unrelated to subtitles.
  • Embedding subtitles directly into video files (consider MKV).

Common Use Cases

  • Creating stylized subtitles for anime and fan translations.
  • Adding karaoke effects to music videos or lyric videos.
  • Developing complex timed text for video localization.
  • Designing visually appealing subtitles for presentations or educational videos.

How to Open It

  1. Open the .ARI file directly within the Aegisub application.
  2. Many video players that support ASS subtitles can also interpret .ARI files, often by renaming them to .ass or using them as external subtitle tracks.
  3. You can open and edit .ARI files in any plain text editor to view or make minor manual adjustments.

What is a .ari file?

The .ARI file format is a subtitle file format specifically designed for the Aegisub advanced subtitling software. It extends the traditional ASS (Advanced SubStation Alpha) format, offering more robust features for creating complex and visually rich subtitles. This format allows for detailed control over text styling, positioning, timing, and even advanced effects like karaoke subtitles. It's primarily used by subtitling enthusiasts and professional localization teams who need precise control over subtitle appearance and behavior.

Programs That Open .ari Files

PlatformProgram
WindowsAegisubFreeOfficial
macOSAegisubFreeOfficial
LinuxAegisubFreeOfficial

How to Convert .ari Files

FormatMethod
.ASSAegisub, Save As
.SRTAegisub (with potential style loss), Online converters

Common Problems with .ari Files

⚠️ Subtitles not displaying correctly in video players.
Ensure the player supports ASS/ARI formats, or try converting to SRT (losing advanced styles). Check file naming and placement for external subtitles.
⚠️ Loss of advanced styling when converting to other formats.
This is expected when converting to simpler formats like SRT. Use Aegisub to export to ASS for best compatibility with players that support advanced styling.

Frequently Asked Questions

Is ARI the same as ASS?

ARI is an extension of the ASS format, offering similar features but often used as a specific project file within Aegisub that may contain additional metadata or be in a specific working state before final export to ASS.

Can I use ARI files directly in video players?

While some advanced players might, it's generally better to export your ARI project in Aegisub to the ASS format for wider compatibility, or convert to SRT if advanced styling isn't required.

How do I edit ARI files?

The best way is to open them in the Aegisub software. You can also edit them in a text editor, but this is less user-friendly for complex styling and timing.

Technical Details

ARI files are text-based and structured using a syntax similar to the ASS format. They contain information about each subtitle line, including its start and end time, text content, style overrides, and positioning. The format supports a wide array of styling tags for fonts, colors, borders, shadows, and transformations, enabling advanced visual customization beyond basic text display.

Did You Know?

The .ARI format is not a final delivery format but often a project file used within Aegisub.
It leverages a powerful scripting engine and tag system to create dynamic subtitle effects.

Security Information

ARI files are plain text and generally safe. However, as with any file, avoid opening files from untrusted sources, as malicious actors could potentially embed harmful scripts or exploit vulnerabilities in subtitle rendering engines, though this is rare for text-based subtitle formats.

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