Convert.Guru

CTT Converter

Convert CTT files online for free


Drop or upload your .CTT file

How to convert your CTT file

  1. Click Select File above, and choose your CTT file.
  2. You'll see a preview.
  3. Click the "Convert file to..." button to save your file in the format you want.


Convert CTT to another file type

The converter easily converts your CTT file to various formats—free and online. No Excel or extra software needed.

  • CTT to CSV
  • CTT to JSON
  • CTT to XML
  • CTT to YAML
  • CTT to YML
  • CTT to TOML
  • CTT to INI
  • CTT to CFG
  • CTT to CONF
  • CTT to DAT
  • CTT to DB
  • CTT to SQL

Convert a file to CTT

The converter also works in reverse, allowing you to convert your file into the CTT file type—in the best quality.

  • DBF to CTT
  • XML to CTT
  • SQLITE to CTT
  • XLSX to CTT
  • SQL to CTT
  • TSV to CTT
  • ACCDB to CTT
  • YAML to CTT
  • MDB to CTT
  • CSV to CTT
  • ODS to CTT
  • JSON to CTT

About CTT files

CTT files, which stand for Contact files, are primarily used by Microsoft Outlook Express to store contact lists. These files are inherently tied to Outlook Express, and moving them to other platforms can be challenging. For more details, visit the Wikipedia page on Outlook Express.

Converting CTT files is essential when migrating contact information to different formats or email clients. Popular conversion formats include CSV, VCF, and TXT. Software like Microsoft Excel and LibreOffice can open CSV files, while Mozilla Thunderbird supports VCF files.

The conversion process can be quite technical, requiring specific software knowledge and sometimes manual data manipulation. One major challenge in converting CTT files lies in maintaining the integrity of contact data, especially with varying formats and data fields.

Additionally, CTT files are becoming obsolete, which presents compatibility issues with modern applications. As such, it's advisable to convert these files to more universally accepted formats like CSV or VCF for future-proofing.

To simplify the conversion process, we recommend using the Convert.Guru website. This platform allows you to drag-n-drop CTT files and convert them effortlessly to different formats. While there are numerous online services available, Convert.Guru ensures a safe, reliable, and user-friendly experience without requiring technical expertise.


The CTT Converter Story

The history of Convert.Guru began more than 25 years ago in California, when Tom Simondi published the most comprehensive database of file formats on his website. Before that, Tom had worked on Space Shuttle development at the Air Force Systems Command’s Space Division in Los Angeles. He is known as one of the top programmers of the late 1980s.

When Microsoft integrated Tom’s Filext database into Windows XP, it became the leading platform for analyzing and processing file types and formats.

Today, we use the latest technologies to analyze, process, and convert one of the world's largest collections of file formats. We are committed to developing the best CTT converter by continuously improving quality, usability, and reliability.

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