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Facing this on your programme?
Talk to us
Mainframe modernization assurance
Modernize
with assurance.
Empowering transformations through trusted testing. We prove functional parity between your mainframe and its modern replacement — before you flip the switch.
What we do
Three capabilities, one outcome: a migration you can sign off.
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Product
ParityFrame Data Migrator
A Windows desktop tool that converts IBM mainframe files from EBCDIC to ASCII using their COBOL copybook — to CSV, fixed-width, JSON, or straight into a REST API. Configure a batch of files once, then run it as often as the programme needs.
Explore Data MigratorOur approach
Parity + Precision + Production
We specialize exclusively in testing modernized mainframe applications — ensuring your migration is functionally sound before it goes live.
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Connect with ParityFrame
Let's modernize together. Tell us where you are in the programme and we'll tell you what parity evidence you're missing.
Product
ParityFrame Data Migrator
Read a mainframe file with its COBOL copybook. Convert it to CSV, fixed-width text, JSON, or load it directly into a REST API. Save the configuration as a project and re-run the whole batch whenever the data changes.
The converter — input file, copybook, file format, code page, and the parsed record layout in one screen.
Capabilities
What it does, precisely.
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Pipelines
Configure the batch once. Run it as many times as the programme needs.
A project holds every file in the migration with its copybook, layout and output target. Dry-run the whole pipeline to validate without writing anything, then run it and watch each file complete, fail or skip.
Walkthrough
From copybook to output
01
Start a project
Name the migration and choose where the project file lives. It's a single portable file — keep it beside the data or in source control.
02
Reopen it any time
Recent projects are one click away, and a project file from a colleague's machine opens just as well.
03
Parse and inspect the layout
Parse the copybook and read the full field grid — level, name, PIC, type, offset, length, decimals and which fields are skipped in output.
04
Choose the output and convert
Pick the format, choose which fields are written, then convert. Warnings name the likely cause rather than guessing at a fix.
Specifications
Supported today
Runs entirely on the operator's machine — no cloud service, no data leaving the desktop. Distributed as a per-machine MSI installer for Windows.
Want to see it against your own copybook?
Leave your email and the installer downloads right away — run it against your own copybook and sample file on your machine.
Thanks — your download should start automatically. If it doesn't, click here.
Thanks — we have your address. The installer isn't posted for direct download yet, so we'll email you the link.
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Windows 10 / 11 · MSI installer · your email goes to our team only.
Technology
The tooling behind a defensible cutover.
Four components, used together on every engagement. Each one exists because a programme we worked on lost weeks without it.
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How an engagement runs
Request a parity assessment
Typically a two-week engagement on one batch stream.
Careers
Work where the legacy knowledge still matters.
We're a small, senior team. You'll be in the detail of a real migration from week one — no bench, no shadowing.
No open positions
We don't have any roles open right now.
When that changes, openings will be listed here first. If you have deep mainframe or modernization-testing experience, we'd still like to know you exist.
Actively interviewing for the roles below. Send a CV and one paragraph on a migration you worked on.
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Nothing fits, but you know this world?
Write to us anyway. Deep COBOL, JCL, DB2 or IMS experience always gets a reply.
Blog
Notes from inside migrations.
Practical writing on parity testing, legacy analysis and cutover evidence.
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Read →
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