Private developer utilities
Convert data.
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Useful format converters that run entirely in your browser. No uploads, accounts, or waiting for a server.
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Popular tools
High-frequency tools for data conversion and account migration, ordered by practical demand.
Account & Session
ChatGPT Session Converter
Convert ChatGPT session JSON into sub2api, CPA, Cockpit, 9router, AxonHub or Codex-Manager formats locally.
Data
JSON ↔ CSV
Convert JSON to CSV or CSV to JSON instantly in your browser. Handles headers, quotes, commas and multiline values without uploads.
Encoding
Text ↔ Base64
Encode text to Base64 or decode Base64 to UTF-8 locally in your browser. Free, instant and no uploads.
Data
JSON ↔ YAML
Convert JSON to YAML or YAML to JSON on one private browser page. Supports nested objects and arrays without uploads.
Data
JSON ↔ XML
Convert JSON to XML or XML to JSON locally. Supports attributes, text and repeated elements while rejecting unsafe entity declarations.
Time
Unix Timestamp ↔ DateTime
Convert Unix timestamps in seconds or milliseconds to UTC ISO dates, or convert ISO DateTime back to Unix seconds.
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