Developers

JSON Formatter and Validator

Paste JSON to format or minify it, and see exactly where an error is, by line and column, with the reason.

JSON Comparison

Show differences in values, keys, and arrays, with options to ignore order or specific fields.

YAML and JSON Converter

Convert between the two formats, restrict unsafe types, and explain formatting that is not preserved.

SQL Formatter

Format a query for a dialect you choose, with highlighting. It does not connect to a database or run the query.

Base64 Encoder and Decoder

Encode or decode a text or small file as Base64, with UTF-8 and input validation.

URL Encoder and Decoder

Encode or decode URL parts, and distinguish path encoding from query encoding.

HTML Entity Encoder and Decoder

Convert between characters and the entities used inside HTML.

URL Parser

Split a URL into protocol, host, path, parameters, and fragment, and report structural errors.

Query String Builder

Add, edit, and encode link parameters, and choose how repeated values are represented.

HTTP Request Code Builder

Set a method, headers, and body, then generate curl and fetch examples. It does not send the request.

ENV to JSON Converter

Read setting pairs and export them, keeping text values and explaining ENV format differences.

ENV Key Comparison

Find missing, extra, and duplicate keys between two files, with values hidden by default.

CSS Unit Converter

Convert px, rem, em, and vw using a font size and container size you set.

String Escape Converter

Show or generate escape sequences for text and Unicode, for an output language you choose.

Number Base Converter

Convert binary, decimal, hexadecimal, and other bases, including large integers.

Gitignore Generator

Choose languages, frameworks, and tools from stated templates and produce an editable ignore file.

JSON Schema Validator

Test a JSON document against a schema you provide and show the fields that do not match, locally.

JSONPath Explorer

Try JSONPath queries on a local document and extract results, with no API connection.

XML and JSON Converter

Convert structure with options for attributes and repeated values. It does not promise identical conversion for every XML file.

Regex Tester

Try a pattern on text and show matches and groups in a separate worker you can stop.

Cron Generator and Preview

Build a cron expression and preview the next runs for a stated dialect and zone, without scheduling anything.

HTML CSS and JavaScript Formatter

Format pasted code locally and show parse errors, without running JavaScript or loading resources.

Web File Minifier

Minify HTML, CSS, and JavaScript with reviewed libraries and show the savings, without executing the code.

TypeScript Interfaces from JSON

Infer a draft of types from a JSON sample, and state that it depends on the sample and needs review.