81 JSON & LLM tools · Web Crypto API · zero upload

JSON that runs in your browser.

Format, validate, transform, generate schemas, count LLM tokens. No sign-up, no upload, no API key. Your JSON never leaves your tab.

JSON formatter · live

Input JSON

Pretty

Pretty-print + validate + sort keys · all in one keystrokestrict parser · clear error line/column · no upload

Formatter Schema JSON → Zod JSON → TS JSON → Python Validator LLM tokens UUID v7

81tools

JSON, LLM, schema, validation, conversion.

100% local

Web Crypto, File, Clipboard APIs. Nothing uploaded.

0sign-up, telemetry, quota

No accounts. No third-party CDN. GDPR-friendly by design.

JSON & LLM toolkit

Format, validate, transform, generate.

Pretty-print, sort keys, infer schemas, generate TypeScript / Zod / Python, validate against draft-07 to 2020-12, count LLM tokens across GPT, Claude, Llama, Gemini.

Format & validate

Pretty-print, minify, sort keys, validate strict JSON with line/column error.

4 tools Open

Schema generator

Infer JSON Schema from any sample. Draft-07 / 2019-09 / 2020-12.

3 tools Open

Convert to code

TypeScript, Zod, Python, Go, C#, Pydantic from a JSON sample.

6 tools Open

LLM tokens

Token counts and price estimates for GPT, Claude, Llama, Gemini.

2 tools Open

UUID & identifiers

Generate and validate UUID v4 / v7. Decode timestamp.

1 tool Open

Inspect & query

JSONPath, statistics, sort, diff, tree viewer, mock data.

7 tools Open

Markdown & text

Markdown preview, text diff, YAML/CSV/XML conversion.

6 tools Open

Format bridges

JSON ↔ XML, JSON ↔ YAML, JSON ↔ CSV, JSON escape, minify.

8 tools Open

All 4 brands

Every tool, by brand.

versal is one brand with four toolkits: JSON for engineers, devops for ops, codegen for templates, sec for crypto.

versal json

versal devops

versal codegen

versal sec

81 tools. Zero upload.

Paste your JSON, get a TypeScript interface. Paste a curl, get a Python script. Nothing leaves the page.

Open JSON formatter