Your everyday developer toolkit
Tiny tools. Mighty impact.
Format a payload, compare JSON, or convert a timestamp. Pick a tool and get back to what you were building.
Free, open source. Tool inputs stay in your browser.
14 tools
JSON Formatter
Validate and prettify JSON with consistent indentation.
JSON to CSV
Turn an array of JSON objects into a CSV file.
JSON Corrector
Repair single quotes, unquoted keys, and trailing commas.
JSON Diff
Compare JSON values and see what changed at each path.
JWT Parser
Decode a JWT header and payload. Signatures are not verified.
TOTP Generator
Generate a rotating one-time code from a Base32 secret.
Timestamp Converter
Convert Unix seconds or milliseconds to a date and time.
Time Unit Converter
Convert durations between milliseconds, seconds, and more.
URL Inspector
Inspect URLs, edit query parameters, and encode or decode components.
Base64 Codec
Encode and decode UTF-8 text using Base64 or Base64URL.
Text Diff
Compare text, logs, and configs with additions and removals.
Cron Explainer
Read a cron schedule and preview its next five runs in your timezone.
CSV to JSON
Convert CSV with headers into JSON, with optional type detection.
Regex Playground
Test JavaScript regex patterns, inspect captures, and preview replacements.
Something missing from your toolkit?
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