Using the tools
- You may use every MainframeKit tool free of charge, for personal or work purposes, as often as you like. No account is needed.
- What you produce with the tools (decoded records, generated JCL, DFSORT statements, converted values) is yours to use.
What you may not do
- Copy, republish or redistribute the site, its pages, its design, its source code or its scripts, in whole or in part, including the error-code explanation pages.
- Scrape, crawl or bulk-download the site with automated tools, or use its content to build another site, product, dataset or AI training set. Normal search-engine indexing is welcome.
- Present the site, or a copy of it, as your own, or use the MainframeKit name to suggest a connection that does not exist.
Linking to any page is welcome. Short quotations with a link back to the page are fine.
Ownership
© 2026 Vidyut Saha. All rights reserved. The MainframeKit name, source code, page design and text belong to Vidyut Saha. To ask for permission for anything not allowed above, email [email protected].
IBM, z/OS, CICS, Db2, IBM MQ and DFSORT are trademarks of International Business Machines Corporation. MainframeKit is not affiliated with or endorsed by IBM.
No warranty
The tools and explanations are provided as-is, without any warranty. Always confirm results against IBM documentation and your own system before changing production data or settings. To the extent the law allows, the author is not liable for any loss arising from use of the site.
Changes
These terms may be updated; the date below shows the latest version.
Last updated 27 October 2026.