3 steps · Finance ops, e-invoicing teams and integrators
UBL invoice XML preflight
Separate malformed XML from unexpected invoice structure before deeper e-invoice validation or remediation.
Start recipe All role paths
Preflight & risk reduction
Free preflight tools before higher-stakes workflows
Run narrow syntax, structure and file-preparation checks before deeper validation, formal review or regulated operational work.
4 canonical workflows10 unique working toolsNo signup for atomic toolsNo duplicate engines
Who this path is for
Operators and implementation teams who need a low-friction first pass before sending data into a regulated, contractual or otherwise higher-stakes process.
Target outcome
Use narrow checks to find cheap-to-fix problems early without pretending that a browser tool can replace regulatory validation, professional review or recipient acceptance.
Decision rules before tool choice
- 01Treat a passing syntax check as evidence of syntax only.
- 02Keep structural triage separate from legal, tax, regulatory or recipient acceptance.
- 03Escalate to specialist validation when the cost of a false conclusion becomes material.
Smallest useful working set
Open the tool that closes the immediate step.
Developer utilitiesMIT
XML Syntax Validator
Check whether pasted XML is well-formed using fast-xml-parser without uploading the document.
Use free toolDeveloper utilitiesMIT
XML Structure Inspector
Inspect the root element, namespaces, element counts and common tag names of pasted XML locally.
Use free toolBusiness utilitiesMIT
UBL Invoice XML Inspector
Inspect common UBL invoice structure and fields locally before deeper e-invoice validation or remediation.
Use free toolValidation utilitiesMIT
ISO 3166-1 Alpha-2 Country Code Validator
Check whether a two-letter country code is officially assigned under ISO 3166-1 alpha-2.
Use free toolBusiness utilitiesMIT
ISO 4217 Currency Code Validator
Check whether a three-letter currency code is officially assigned under ISO 4217.
Use free toolValidation utilitiesMIT
RFC 3339 Date & Time Validator
Check whether a pasted date-time follows RFC 3339 syntax locally in the browser.
Use free toolImagesMIT
Passport Photo Cropper
Crop a passport-photo candidate locally before size and compliance checks.
Use free toolImagesMIT
Exact Image Resizer
Resize a local image to exact pixel dimensions with Pica and download the result without uploading it.
Use free toolFieldMIT
Evidence Photo Cropper
Crop a field evidence photo locally while keeping the original file on your device.
Use free toolReusable workflow layer
When one tool is not enough, reuse a real recipe.
3 steps · API, finance and operations teams
API reference-field preflight
Check common country, currency and timestamp fields before sending a sample payload or mapping downstream.
Start recipe2 steps · Applicants, assistants and document-prep teams
Passport photo file prep
Crop and resize a passport-photo candidate locally before any formal compliance review or submission.
Start recipe2 steps · Field, inspection and evidence teams
Field evidence photo prep
Prepare a field evidence image locally before attaching it to a handover, inspection or proof bundle.
Start recipeFree → paid boundary
Do not pay because the site has a paywall. Pay when the job changes.
Free preflight is intentionally narrow. It does not replace statutory validation, professional advice, platform acceptance testing or a supported compliance outcome; those require the appropriate specialist process.