All tools

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JSON Formatter

Free JSON formatter: beautify, minify, validate, tree view. Runs locally, no upload; supports JSON5 and Unicode escapes.…

Rx

JSON Repair

Repair truncated, concatenated, or log-wrapped JSON. Formatter still beautifies valid JSON.

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JSON Diff

Side-by-side JSON diff with add/remove/change highlights. Local-only—great for API change review and regression testing.…

+/−

JSON Patch

Apply or generate RFC 6902 JSON Patch. Diff stays for visual comparison.

\\u

Escape & Encode

Escape and unescape JSON strings; convert CJK and Unicode. Local processing for embedding in code and debugging special characters.…

$/*

JSON Path

List all JSON paths or extract nodes with JSONPath. Supports filter expressions; runs locally.…

jq

jq Playground

Run jq-style filters in the browser. JSONPath stays on the Path tool.

∪

Merge & Clean

Deep-merge two JSON documents or strip null/empty strings/arrays. Local processing for config merge and log cleanup.…

{?}

Schema Validator

Validate JSON against JSON Schema (draft-07 / 2020-12 subset). Local, no upload. Syntax errors still go to Formatter.

⇄

YAML ⇄ JSON

Two-way YAML ↔ JSON for Kubernetes, Docker Compose, and other configs—local conversion, zero upload.…

XML

XML ⇄ JSON

Two-way XML ↔ JSON while preserving structure. Local browser tool for SOAP responses and legacy migrations.…

CSV

CSV / Excel

CSV, Excel ↔ JSON with header mapping. Parse spreadsheets locally—data never hits a server.…

?&

Query params

URL query strings ↔ JSON objects. Build and debug GET parameters locally.…

PM

Postman

Parse Postman Collection v2 JSON and extract requests. Local-only to protect API data.…

SQL

SQL ⇄ JSON

JSON → CREATE TABLE / INSERT, or SQL INSERT → JSON. Local database script helper.…

TOML

TOML ⇄ JSON

Two-way TOML ↔ JSON for Cargo, pyproject.toml, and similar configs.…

NL

NDJSON / JSONL

Convert NDJSON / JSONL ↔ JSON arrays, or validate bad lines. For logs and LLM batches—not a generic formatter.

a.b

Flatten / Unflatten

Flatten nested JSON to dotted keys and unflatten back. Query tool stays for a=1&b=2.

TS

Code generator

Generate TypeScript, Java, and Go types from JSON samples. Local inference for faster API work.…

{S}

Schema Generator

Infer JSON Schema from a sample. Code Generator keeps TypeScript / Java / Go.

◎

JSON mind map

Render JSON as a mind map / tree diagram. Local rendering for large nested objects.…

▶

Lottie preview

Paste Lottie JSON and preview animations instantly. Local rendering for motion QA.…

B64

Codec

Base64 and URL encode/decode with UTF-8. Local processing for debugging and data transfer.…

TS

Timestamp

Unix timestamps ↔ readable dates (seconds or milliseconds). Instant local conversion for log debugging.…

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Mock generator

Generate random mock JSON from templates with placeholders. Local generation for frontend integration and tests.…

JWT tools

Decode, sign, and verify JWT (HS256/RS256). Keys stay in the browser—never uploaded.…

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Sensitive Data Redactor

Mask password, token, api_key, authorization, email as [REDACTED]. Local only. Merge still removes empty values.