JSON Schema Version Migrator
JSON Schema Version Migrator: Replaces legacy `id` keyword with `$id` and updates `$schema` URI to Draft 2020-12.
About this json schema version migrator
JSON Schema Version Migrator — browser-based utility.
How this tool works
Implements client-side JSON Schema Version Migrator operations. Replaces legacy `id` keyword with `$id` and updates `$schema` URI to Draft 2020-12 specifically designed for an engineer migrates a json schema draft 4 document to draft 2020-12 syntax.
- Schema Ingestion & Meta-Schema Compilation: Loads the target schema and compiles it against the designated JSON Schema draft specification.
- Structural Constraint Resolution: Traverses properties, items, allOf, anyOf, oneOf, and $ref references with recursive loop prevention.
- Evaluation / Mock Synthesis: Validates instance data against compiled constraint functions, or deterministically generates mock values satisfying min/max/pattern rules.
- Diagnostic Reporting: Outputs comprehensive JSON validation error objects detailing failed keyword, schema path, and data path.
Worked example
Scenario: An engineer migrates a JSON Schema Draft 4 document to Draft 2020-12 syntax.
Sample input:
Processing: Replaces legacy `id` keyword with `$id` and updates `$schema` URI to Draft 2020-12.
Illustrative output:
Limits and verification
Safely handles recursive references ($ref: '#') with cycle detection guards to prevent stack overflows. Flags invalid regex patterns within 'pattern' keywords and reports unsupported schema draft versions.
Examples demonstrate an expected workflow; they do not prove every input or every branch of an external specification. Check important results with an independent source before using them for money, security, compliance, safety, or irreversible file changes.
Browser processing boundary
Tool input is processed by code running in the browser and is not intentionally sent to a CZOA processing API. The page can still request ordinary site assets, analytics, or advertising when those services are enabled. Browser extensions and managed-device software remain outside this tool's control.
Relevant references
These references govern or help explain the format, protocol, or calculation used here. Listing a reference does not claim certification or complete implementation of every optional feature.
- JSON Schema: A Media Type for Describing JSON Documents (Draft 2020-12)
- JSON Schema Validation: A Vocabulary for Structural Validation of JSON (Draft-07)
Content owner: CZOA Tools · Last reviewed: 2026-09-15 · Review methodology
How to use it
- Enter, paste, or select your input data into the JSON Schema Version Migrator workspace controls.
- Review available parameter fields, units, formats, or options configured for your task.
- Click the action button or observe immediate live calculations rendered in your browser runtime.
- Inspect the resulting output and any diagnostic messages, then copy or download the result if needed.
Frequently asked questions
What does JSON Schema Version Migrator change?+
It reads a JSON schema document and target draft, clones its structure, adjusts supported draft conventions, and emits a formatted migrated schema.
What did the migration fixture verify?+
A schema with target 2020-12 produced output containing that target draft designation while preserving the supplied string-schema structure.
Does migration prove semantic equivalence?+
No. The tool rewrites known schema vocabulary locally; it does not validate instances, resolve remote references, test validators, or guarantee every draft feature has an equivalent.
Which input must be supplied?+
The primary input must parse as JSON. Target can come from target in the object or the secondary field, otherwise the implementation defaults to 2020-12.