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A guide to choosing

Developer tools

Choose the operation that matches your data: readable JSON, a precise instant in time, a correctly encoded URL value or a table-shaped export. These utilities work locally, without sending your input to a debugging service.

What do you want to do?

Inspect a JSON payload

Use the JSON formatter to validate syntax and turn compact JSON into a readable structure, or minify it for copying. If the source is a spreadsheet export instead, convert the CSV to JSON first rather than manually assembling object syntax.

  • JSON formatter
  • CSV ↔ JSON

Make sense of a timestamp

Use the Unix timestamp converter for seconds or milliseconds since the Unix epoch, inspect the date in your chosen time zone, or convert UTC date fields back to a timestamp. Check the unit before comparing values from different systems.

  • Unix timestamp converter

Encode the right part of a URL

Use the URL encoder and decoder for individual URL components or form values, or inspect an HTTP or HTTPS URL locally. Choose the matching mode: spaces and plus signs do not have the same meaning in every encoding context.

  • URL encoder decoder

All available Developer tools

CSV ↔ JSON

Convert CSV/TSV to string-preserving JSON or flat JSON to CSV with precision-safe numbers, column selection and full exports.

Open tool

JSON formatter

Format, minify and validate JSON, with exact error positions.

Open tool

Unix timestamp converter

Convert Unix seconds or milliseconds to timezone-aware dates and UTC dates back to timestamps.

Open tool

URL encoder decoder

Encode/decode URL components and form values, or inspect HTTP/HTTPS URLs locally.

Open tool

Before you start

Valid JSON is not a valid application payload

A syntax check cannot confirm required fields, business rules or a server's schema. Review the receiving application's requirements before importing formatted or converted data.

Encoding is not encryption

URL encoding makes characters safe for a particular URL context; it does not hide secrets. Do not put passwords or private tokens into links, even when their characters are encoded.

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