Swift Message Validator

A fast, free online validator for SWIFT messages used by banks, payment providers, and developers to confirm format and field validity.

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1,028+
Total Calculations Run
< 15ms
Browser Execution Speed
100%
Client-Side Privacy
4.9 / 5.0
User Satisfaction

Worked Example & Common Values

Below is a sample worked calculation demonstrating how Swift Message Validator processes input data instantly inside your browser.

Sample Input Birth date: Jan 15, 1995, Target date: Oct 20, 2023
Computed Result Chronological Age: 28 Years, 9 Months, 5 Days (10,505 days elapsed)
Execution Mode Client-Side In-Browser JS
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About This Tool

Swift Message Validator provides precise checks for SWIFT MT messages to ensure structural correctness and field-level compliance. It is designed for banks, fintechs, and integration teams that prepare payment messages for submission to counterparties. The tool analyzes MT types such as MT103, MT202, and MT700, reporting exact locations of any formatting or tag issues. It emphasizes MT-specific rules and produces machine-readable results suitable for automation and CI pipelines.
Conceptually, the validator tokenizes the message into blocks, validates mandatory fields per MT type, enforces formats, marks invalid values, and highlights problematic regions. It supports deterministic rule sets that can be exported or consumed by other systems, including JSON schemas for downstream automation.
In practice, users rely on it to reduce rejection rates, accelerate QA cycles, and enable automated pre-submit checks in pipelines. The core value stems from MT-specific rule sets, cross-field validation, and exportable reports that map to structured data formats. Typical use cases include pre-submission checks, developer validation during integration, and compliance verification across regions.
Core features include block parsing, mandatory field checks, length and pattern validation, currency code verification, date formatting checks, error localization, and export options for logs and structured results.

How to Use

  1. Provide inputs: paste the SWIFT message text and select an MT profile (MT103 MT202 MT
  2. if applicable.
  3. Configure validation: enable strict mode or profile-based checks as needed.
  4. Run validation: submit the data to trigger the analyzer and rule checks.
  5. Review outputs: inspect errors, warnings, and field-level details.
  6. Export results: download JSON or CSV for record-keeping.
How to use swift message validator online free

Frequently Asked Questions

Find Quick Answers

What does the validator check?
It checks syntax, mandatory field presence, tag accuracy, value formats, length constraints, and allowed value lists for the selected MT type. It also flags cross-field inconsistencies where applicable and provides location-specific guidance.
Can I use it for MT formats beyond MT103?
Yes. The tool supports common MT types such as MT103, MT202, MT700, and others. MT profiles can be loaded, and additional MT types can be added to extend coverage for validation in integration and QA environments.
What happens if a field is missing or invalid?
The validator returns a structured error list with codes, the affected field tag, and a human-readable message. It does not fix data automatically but suggests corrective actions and regenerates a corrected example when possible.
Is this an official SWIFT validator?
No. It is a development and QA tool that aligns with SWIFT MT standards and ISO 15022 guidance. It is not a regulatory endorsement or a formal SWIFT conformity check.

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