Developer tools

Small tools for inspecting data, debugging formats, and preparing code. Paste a sample or import a supported file to get started.

Tools 17

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UTM link builder

Build campaign links with validated URLs and editable tracking parameters.

Meta tag generator

Write titles and descriptions, preview a search snippet, and export safe HTML.

ASCII table generator

Edit a table or paste CSV, TSV and JSON to create aligned text tables.

Directory tree generator

Create ASCII or Unicode directory trees from file paths and outlines.

JSON formatter

Format, validate, and minify JSON data.

JSON viewer

Explore nested data in an interactive tree.

JSON search

Search JSON keys and values.

JSONPath explorer

Run JSONPath queries on structured data.

Code formatter

Consistent formatting for code and markup.

UUID generator

Generate UUID v4 or timestamp-based UUID v7 identifiers.

JWT inspector

Decode JWT headers, claims, and expiry dates.

Regex playground

Test regular expressions and preview replacements.

CSV ↔ JSON

Convert CSV or TSV to JSON objects or arrays.

Number base converter

Binary, decimal, hex, and every base from 2 to 36.

JSON comparison

Compare JSON values, ignoring formatting and key order.

JSON Lines converter

Convert JSON arrays to JSONL or NDJSON and back.

IPv4 subnet calculator

Calculate network masks, host ranges, and CIDR blocks.

Choose the JSON operation

Format changes whitespace. Viewer expands a tree. Search finds keys and values. JSONPath selects values with a query. Comparison checks structure and values rather than layout.

Preserve data types

Keep identifiers as strings when leading zeros or exact digits matter. CSV values start as text, while JSON distinguishes numbers, strings, booleans, arrays, objects, and null.