Free Online Developer Tools

AI JSON Repair

Fix broken JSON from ChatGPT, APIs, logs and config files with local repair and optional AI fallback.

JSONFree

JSON Formatter

Prettify JSON with readable indentation, validation and one-click copy.

JSONFree

JSON Validator

Validate JSON syntax and find parse errors before using it in code or APIs.

JSONFree

JSON Minifier

Remove whitespace from JSON for compact API payloads and config snippets.

JSONFree

JSON to CSV

Convert JSON arrays and objects into CSV tables for spreadsheets and reports.

JSONFree

CSV to JSON

Convert CSV tables into JSON arrays with header-based object keys.

JSONFree

JSON to YAML

Convert JSON into clean YAML for configs, docs and examples.

JSONFree

JSON to TypeScript

Generate a TypeScript interface from sample JSON data.

JSONFree

JSON to Schema

Generate a JSON Schema draft-style object from example JSON.

JSONFree

JSON Sorter

Sort JSON object keys recursively for stable diffs, cleaner configs and predictable output.

JSONFree

JSON Path Extractor

Extract a value from JSON with a simple path such as $.user.name or items[0].id.

JSONFree

JSON Lines to JSON

Convert JSONL or NDJSON rows into a JSON array, or convert a JSON array back to JSON Lines.

JSONFree

JSON to Markdown Table

Convert JSON arrays and objects into Markdown tables for docs, GitHub READMEs and notes.

JSONFree

JSON Compare

Compare two JSON values and list added, removed and changed paths.

JSONFree

JSON Escape / Unescape

Escape strings for JSON or unescape JSON string values back to readable text.

JSONFree

Base64 Encode / Decode

Encode text to Base64 or decode Base64 back to Unicode text.

EncodeFree

MD5 Generator

Generate MD5 hashes for text, checksums and quick non-security fingerprints.

HashFree

SHA256 Generator

Create SHA-256 hashes for text with the browser crypto API.

HashFree

Timestamp Converter

Convert Unix timestamps to dates and dates back to Unix time in seconds or milliseconds.

TimeFree

Current Unix Timestamp

Get the current Unix timestamp in seconds, milliseconds, local time and UTC.

TimeFree

URL Encode / Decode

Encode text for URLs or decode percent-encoded query strings.

EncodeFree

URL Parser

Parse a URL into protocol, host, path, query parameters, hash and origin.

EncodeFree

Query String to JSON

Convert URL query strings into JSON objects for debugging links and tracking parameters.

EncodeFree

HTML Entity Encode / Decode

Encode HTML entities or decode escaped HTML text back to readable characters.

EncodeFree

UUID Generator

Generate random UUID v4 identifiers for tests, records and API examples.

RandomFree

Case Converter

Convert text into camelCase, PascalCase, snake_case, kebab-case, uppercase and lowercase.

TextFree

Slug Generator

Generate clean URL slugs from titles, headings and article names.

TextFree

Word Counter

Count words, characters, lines and paragraphs in plain text.

TextFree

Remove Whitespace

Remove spaces, tabs, line breaks or normalize repeated whitespace in text.

TextFree

Text Formatter

Format plain text by trimming lines, normalizing blank lines and cleaning repeated spaces.

TextFree

Find and Replace Text

Find and replace text online with plain text or regex-style replacement.

TextFree

Regex Tester

Test regular expressions against text and inspect matches, groups and indexes.

TextFree

Line Sorter

Sort lines alphabetically, reverse line order and clean line-based lists.

TextFree

Duplicate Line Remover

Remove duplicate lines from lists while preserving the first occurrence order.

TextFree

Cron Parser

Explain common 5-field cron expressions in plain English.

TimeFree

JWT Decoder

Decode JWT header and payload without sending tokens to a server.

EncodeFree

Password Generator

Generate strong random passwords with configurable length and simple character options.

RandomFree

Text to JSON

Convert simple key-value text, lists and tables into clean JSON.

AIFree