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Format
JSON
Limit
1 MiB total
Runtime
Browser

Validate JSON Patch syntax and applicability

Check operation shapes alone or validate sequential applicability against a document.

Local processingNo sign-upNo presets or upload

Validate JSON Patch

Each document is capped at 512 KiB; combined input is capped at 1 MiB.

Tool Swim does not upload, fetch, save, log, or create presets from these values.

Patch validation report

The report states the algorithm, semantics, paths, counts, or conflicts used as proof.

What this tool proves

Explicit, bounded structural semantics

Syntax-only validation cannot prove that paths exist in a future document. Add the optional document to validate path, index, test, move, and copy behavior against that exact value.

Document-aware validation is optional and explicit

Syntax-only validation cannot prove that paths exist in a future document. Add the optional document to validate path, index, test, move, and copy behavior against that exact value.

Each document is capped at 512 KiB, combined input at 1 MiB, traversal at 100,000 values and 100 levels, reports at 10,000 entries, and output at 1 MiB. Source and results stay in the active browser tab.

Parsing and comparison semantics

Inputs use the browser's JSON parser. Duplicate object names therefore keep their last value, object member order is ignored, array order is preserved unless the selected tool explicitly says otherwise, and integers outside JavaScript's safe range are rejected instead of rounded silently.

Primary references

Questions and answers

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