JSON Formatter & Code Utilities — Format, Validate & Minify
Working with JSON data is a daily necessity for modern developers. Tooliva offers the
best free JSON formatter online — a powerful tool that instantly formats,
validates, and beautifies your JSON data with proper indentation. Our free online JSON formatter acts as a full JSON validator and JSON parser,
catching syntax errors before they cause problems in your application. Unlike other
tools that send your data to a server, everything runs client-side. Your data never
leaves your browser.
Beyond JSON, we provide a complete suite of code utilities. Our HTML minifier, CSS minifier, and JavaScript minifier strip whitespace
and comments from your code, reducing file sizes for production. The SQL formatter beautifies your database queries, while the Markdown preview lets you write
and preview rendered HTML side by side. Use our HTML entity converter to
encode and decode special characters. Whether you need a JSON beautifier, JSON lint checker, or JSON viewer, Tooliva is your
one-stop destination for code formatting tools.
Security & Text Tools — JWT Decoder, Hash Generator & Regex Tester
JSON Web Tokens are the backbone of modern authentication. Tooliva's JWT decoder instantly parses the header, payload, and signature sections of any RFC 7519 compliant token,
presenting the data in a clean, structured format. Unlike many JWT parser tools that require server-side processing, our decoder runs entirely in your browser, ensuring
sensitive token data never touches a network. It works perfectly as a drop-in replacement
for jwt.io when you need a fast, private JWT decoder online.
Our security toolkit also includes a hash generator supporting MD5, SHA-1,
SHA-256, and SHA-512 using the Web Crypto API, and a password generator that
creates strong random passwords with configurable length, character types, and entropy strength
indicator. For text processing, the regex tester lets you test regular expressions
with live matching across multi-line strings, and the diff checker compares
two texts side by side using an LCS-based algorithm with color-coded additions and removals.
The text replacer supports find-and-replace with optional regex mode.
Encoding, Conversion & Design Tools for Developers
Tooliva offers a comprehensive set of encoding and conversion utilities. Our Base64 encoder and decoder lets you encode strings and decode Base64 data instantly, with an optional URL-safe mode.
The URL encoder/decoder handles percent-encoding for query parameters and
full URLs. Generate unique identifiers with our UUID generator,
supporting v4 (random) and v1 (time-based) with bulk generation up to 100 UUIDs at once.
The JSON to CSV converter transforms JSON arrays to CSV and back, while the
HTML entity converter handles both named and numeric character references.
For designers and frontend developers, the color converter translates between
HEX, RGB, and HSL color spaces with a live preview. The CSS gradient generator provides a visual builder for linear and radial gradients, outputting ready-to-use CSS code.
The number base converter converts between binary, octal, decimal, and hexadecimal.
Build and understand cron schedules with the cron builder — perfect for DevOps
engineers managing scheduled tasks. Round out your workflow with the case converter, timestamp converter, lorem ipsum generator, and word counter. All tools are free, private, and require no account setup.