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Tool cluster

Free Developer Tools Online

Format JSON, XML, YAML, SQL, encode Base64 and URLs, test regex, generate UUIDs, hash text, decode JWTs, and convert timestamps.

developer tools onlinejson formatterjwt decodertimestamp converter

QuickToolsKit developer tools are small browser utilities for debugging, formatting, encoding, inspecting, and cleaning data. They are useful between code editors, API clients, dashboards, logs, and documentation.

Local-first developer utilities are convenient for everyday snippets. Avoid pasting secrets, private customer data, or production credentials into any web page unless you fully understand the risk.

TOOLS

Ready tools in this cluster

11 working tools

JSON Formatter

Validate, format, and minify JSON data.

Browser-localOpen →

XML Formatter

Format, minify, and inspect XML structure.

Browser-localOpen →

YAML Converter

Convert between YAML and JSON and check syntax.

Browser-localOpen →

Base64 Encoder & Decoder

Encode or decode Unicode text with Base64.

Browser-localOpen →

URL Encoder & Decoder

Encode or decode URL components and query values.

Browser-localOpen →

Regex Tester

Test regular expressions, matches, and groups live.

Browser-localOpen →

UUID Generator

Generate standards-compliant random UUIDs in batches.

Browser-localOpen →

SHA-256 Hash Calculator

Calculate a SHA-256 digest for text.

Browser-localOpen →

JWT Decoder

Inspect JWT headers, payloads, and time fields locally.

Browser-localOpen →

SQL Formatter

Format SQL indentation and keywords for common dialects.

Browser-localOpen →

Timestamp Converter

Convert between Unix timestamps and local date-time values.

Browser-localOpen →

LONG TAIL

Popular task pages

Focused search pages connected to these tools

JSON Formatterformat and validate JSON Base64 Encoder and Decoderencode or decode Base64 text URL Encoder and Decoderencode or decode URL text JWT Decoderdecode JWT payload locally Timestamp Converterconvert Unix timestamp to date UUID Generatorgenerate UUID v4 values Regex Testertest a regular expression SQL Formatterformat SQL queries Format JSON Onlineformat JSON online Minify JSON Onlineminify JSON online Decode Base64 Onlinedecode Base64 text Encode Base64 Onlineencode text to Base64 Decode URL Onlinedecode URL encoded text Encode URL Onlineencode text for a URL Decode JWT Tokendecode JWT token fields Unix Timestamp to Date Converterconvert Unix timestamp to date Date to Unix Timestamp Converterconvert date to Unix timestamp

GUIDES

Related guides

Helpful explainers linked to this cluster

Developer basics

What Is a Base64 Image and When Should You Use One?

Understand Base64 image data URLs, when they help, when they hurt performance, and how to convert images safely.

Security basics

How to Create Strong Passwords Without Reusing Them

Learn practical password rules, length choices, randomness, password managers, and safe generation habits.

Developer tools

JSON Formatting Guide for APIs, Config Files, and Debugging

Understand JSON formatting, minifying, validation, common syntax errors, and when to use a browser-local formatter.

Free Developer Tools Online FAQ

Can I format JSON online?

Yes. QuickToolsKit includes a browser-local JSON formatter and minifier.

Does the JWT decoder verify signatures?

No. It decodes header and payload content for inspection; it does not prove trust or validity.

Are developer tools safe for secrets?

Use caution. Local-first tools reduce routine upload risk, but secrets should still be handled carefully.