Make sense of banking and payment formats
The financial industry runs on a long list of specialized message formats, and most of them were designed for machines rather than humans. A raw SWIFT MT103, an ISO 20022 pain.001 XML, a NACHA batch, or an ISO 8583 authorization message is dense, positional, and unforgiving — a single misplaced field can change the meaning of an entire transaction. These tools turn that raw text into a clear, structured, field-by-field view so you can understand exactly what a message contains.
Every parser in this category runs entirely in your browser. Because financial messages routinely contain account numbers, names, and amounts, nothing you paste is ever uploaded to a server. That makes these tools safe to use with real production data when you’re debugging an integration or investigating a failed payment.
Tools in this category
- SWIFT MT Parser — Decode MT messages (MT103, MT202, and more) into their blocks and fields.
- ISO 20022 Parser — Explore
pain,pacs, andcamtXML messages. - NACHA / ACH Parser — Break down ACH batch files record by record.
- Fedwire Parser — Inspect Fedwire funds-transfer messages and their tags.
- ISO 8583 Parser — Decode card transaction messages and their bitmaps.
- EDI X12 Parser — Read X12 transaction sets, segments, and elements.
- Check 21 Parser — Parse X9.37 image cash letter files.
- Positive Pay Parser — Review issued-check files for fraud prevention.
- BAI2 Parser — Decode BAI2 bank statement and balance reporting files.
- Card Clearing Analyzer — Analyze card clearing and settlement records.
Common use cases
These parsers are everyday companions for payment engineers, integration developers, and back-office and treasury teams. Typical tasks include validating that an outgoing message is well formed before sending it to a bank or network, diagnosing why a counterparty rejected a file, comparing a message against a specification, and learning an unfamiliar format by inspecting a known-good example. Each tool pairs the parser with a plain-language explanation of the format so you can build real understanding, not just transform text.
Frequently asked questions
Are my financial files uploaded anywhere? No. Parsing happens locally in your browser, which is why these tools are safe to use with sensitive data.
Can these tools validate a message, not just display it? They highlight structural problems and surface fields clearly so you can spot issues quickly. They are diagnostic and educational aids, not a certified compliance check.
Which message versions are supported? Each tool’s page documents the formats and message types it handles, with worked examples you can load with one click.