Opening an RTTM File

The RTTM file type is primarily associated with Text Editor.

RTTM	File extension: RTTM
	File type:	plain text file

What is an RTTM file?

RTTM files mostly belong to Text Editor. RTTM files are Rich Transcription Time Marked files that store detailed time annotations for speech transcriptions.
These files keep track of when speech segments start and stop, often noting the speaker and segment durations.

Transcription timing: Each entry marks a precise time reference for spoken content.

Speaker diarization: They can include information to show which speaker is talking.

Data alignment: Used to synchronize transcripts with corresponding audio files.

FilExt.com notes: This plain text file is used mainly in speech recognition research and transcription processing. You can open it with any basic text editor such as Notepad. Advanced users may use specialized speech analysis tools to further process the timing data.

How can I open an RTTM file?

You need a suitable software like Text Editor to open an RTTM file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your RTTM file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a RTTM file directly in the browser:. Just drag the file onto this browser window and drop it.

Online RTTM Text Viewer

Choose your .rttm file to analyze

or drag and drop it here

Online File Viewer

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Programs that open and convert RTTM files:

Text Editor
See the previous paragraphs to learn more about the main application. RTTM files are often referred to as Text Editor simple text files because this type of file is primarily created or used by this software.
Speech Recognition Software
An RTTM (Rich Transcription Time Marked) file is a text-based file format used for storing transcriptions of audio or video recordings. It includes time markers to indicate when each word or phrase was spoken. The format is designed for efficient storage and processing of transcription data, often used in speech recognition, natural language processing, and linguistic research. The structure is relatively simple, making it easy to parse and manipulate programmatically. Key features include its time-coded nature, allowing for precise alignment with the original media, and its support for speaker identification, enabling differentiation between multiple speakers in a recording. This file format is classified as Transcription File.

RTTM file format:

If you can determine the file format, the associated program can also be determined. Each file format has a unique extension and almost always a unique signature. For example, Microsoft Word documents have the extension .docx and the signature (usually the first 3 characters in this file) PK. Frequently, however, one file extension is used by different programs for different file formats, and one file format for different file extensions. When there is a problem with a file, the first step to solving it is to determine the file format. Our evaluation of the RTTM files is as follows:

RTTM is not a common file extension and mainly uses a special format. However, the following two file formats are common:

96% of all RTTM files start with the bytes SPEAKER crucial for this file format. These files are plain text, which means they can be viewed with any text editor such as Windows Editor, Nano for Linux, and TextEdit for macOS. The files are on average 3 KB in size and range from 310 bytes to 33 KB. It is a modern file type. The following keywords are characteristic: <NA> <NA> and SPEAKER_00 <NA>. Some examples of file names are audio.rttm. Files like these have the following tags: annotation, auto, diarization, output and abjxc.

All other RTTM files (4%) have different formats. You can get all the details of your RTTM file by dragging it onto this page or by clicking the button "Choose your .rttm file to analyze" above.

Technical Data for RTTM File Extension

File classification:

Simple text file

Related files:

ctm, srt, vtt, stm, rtm, txt

an rttm plain text file is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with RTTM files

Associate the RTTM file extension with the correct application.
Update your software that should actually open plain text files. Because only the current version supports the latest RTTM file format. Search, therefore, e.g. on the manufacturer website after an available Text Editor update.
To make sure that your RTTM file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .RTTM file online - secure, fast, and no downloads needed.