JSON & data
Format, validate, repair, and convert JSON, CSV, XML, YAML.
Browser-based JSON formatter, CSV ⇄ JSON converter, multi-format data converter, and validators — for backend devs, data analysts, and anyone wrangling exports.
Latest in this suite
1 fresh tool just shipped
All json & data
4 tools in total
What's in this suite
Pretty-print and validate JSON before pasting into Postman, repair broken JSON your colleague sent over Slack, convert a CSV vendor feed into a JSON array for an API import, or pivot a YAML config to CSV for a stakeholder review. All RFC-4180 / RFC 6350 / RFC 5545 compliant where applicable, all running locally so production payloads, customer data, and API tokens never touch a server.
Common workflows
Common pairings: JSON Formatter + Data Converter for cleaning up an API response and re-emitting as CSV for Excel. CSV to JSON + JSON Formatter for typed, pretty-printed output ready for Postman. Data Converter (JSON → YAML) for converting an API contract into a Helm chart values file.
Frequently asked
Quick answers about the json & data suite.
Does my JSON / CSV ever leave my device?
No. All parsing, formatting, validation, and conversion run via JavaScript in your browser. Sensitive payloads — production exports, customer rows, API tokens — never touch any CleverTools server.
Which spec are these tools compliant with?
CSV parsing follows RFC 4180 (quoted commas, escaped quotes, multi-line cells via PapaParse). JSON formatting is JSON.parse + a pretty-printer. The vCard converter follows RFC 6350. iCal events follow RFC 5545.
Is there a row / size limit?
Limited only by your browser's memory. Most laptops handle 5–20 MB JSON / XML files comfortably; CSV with 100K+ rows works fine. Very large files (>50 MB) may freeze the tab — split them first.
Can it repair broken JSON?
Yes. The JSON Formatter has a Repair button that fixes the most common issues — trailing commas, unquoted keys, single-quoted strings, JavaScript-style comments — and returns valid JSON.
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