JSON Formatter
Format JSON with readable spacing and indentation for API debugging, payload review, documentation prep, and faster inspection of nested objects.
Open tool pageDeveloper Tools
Explore free online developer tools for JSON, XML, URLs, Base64, JWTs, hashing, parsing, validation, formatting, and browser-based debugging workflows.
This category brings together practical utilities for developers, QA teams, product teams, support engineers, analysts, and technical writers who need fast answers from structured data. Use these pages to inspect payloads, validate markup, decode tokens, review headers, analyze URLs, compare content, and transform machine-readable text without opening a full IDE.
Whether you are debugging an API response, cleaning up a copied request body, checking a redirect parameter, validating XML before upload, or converting values between common developer formats, this category gives you a clean starting point and clear internal paths to deeper tools, use cases, and related guides.
What you can do with these tools
Use these browser-based developer tools to format and validate JSON, clean up XML, encode and decode Base64, inspect HTTP headers, parse URLs and query strings, work with UUIDs and JWTs, test regular expressions, convert timestamps, hash files, and inspect user-agent strings.
The category also supports adjacent implementation work such as formatting CSS, JavaScript, SQL, and HTML; comparing structured payloads; checking password strength; converting between number bases; and turning raw request data into something easier to read, review, and share.
Popular tools
Start here for common developer workflows, then branch into the full category list below.
JSON Validator
Check whether JSON is valid and identify parsing issues before an API call, import, config update, or documentation handoff.
Open tool pageJSON Minifier
Remove unnecessary whitespace from JSON for compact payloads, embedded config snippets, test fixtures, and transport efficiency.
Open tool pageXML Formatter
Beautify XML so feeds, config files, exports, and integration payloads are easier to scan, debug, and share across teams.
Open tool pageQuery String Parser
Turn query strings into readable key-value pairs for campaign links, redirect parameters, filters, and API query debugging.
Open tool pageJWT Generator
Build a JWT from header and payload JSON for local testing, auth demos, education, and token structure review.
Open tool pagePassword Strength Checker
Test password strength and review missing criteria before account creation, reset flows, or internal policy checks.
Open tool pageNumber Base Converter
Convert values between binary, decimal, hexadecimal, and octal for debugging, programming, and low-level reference work.
Open tool pageBrowse all tools
Every page in this category is linked below to improve discovery and help visitors move directly from a broad category page to a specific workflow. You can also visit the full tool library or return to the homepage to browse across categories.
JSON Formatter
JSON Validator
JSON Minifier
JSON Beautifier
CSV to JSON Converter
JSON to CSV Converter
XML to JSON Converter
JSON to XML Converter
Base64 Encoder
Base64 Decoder
URL Encoder
URL Decoder
HTML Escape
HTML Unescape
JWT Decoder
MD5 Hash Generator
SHA256 Hash Generator
Timestamp Converter
Unix Timestamp to Date
Date to Unix Timestamp
Regex Tester
Cron Expression Reader
SQL Formatter
HTML Formatter
CSS Minifier
JavaScript Minifier
Text Diff Checker
Line Sorter
Duplicate Line Remover
JSON Compare Tool
JSON Schema Validator
XML Formatter
XML Validator
URL Parser
HTTP Header Parser
JWT Generator
UUID Validator
Base64 URL Encoder
Base64 URL Decoder
Query String Parser
Query String Builder
CSS Formatter
JavaScript Formatter
Password Strength Checker
File Hash Checker
Number Base Converter
User Agent Parser
Common developer workflows
Most visits to this category start with one of a few practical tasks: make structured data readable, verify whether it is valid, isolate a broken field, decode an encoded value, compare two payloads, or convert content into a format another system accepts.
A typical path might start with JSON Formatter or XML Formatter, continue to JSON Validator or XML Validator, and then move into supporting tools such as Query String Parser, URL Parser, JWT Decoder, Base64 Decoder, or HTTP Header Parser.
This structure helps both users and search engines understand how the category relates to the tool pages underneath it, while giving visitors clear next clicks based on intent.
Use cases
Use these workflow pages to move from a broad category search into a concrete task with the right tool path already mapped out.
Related guides
These supporting pages help users move from the category hub into the most relevant comparison, workflow, or broader topic cluster.
Related categories
Developer Tools overlaps with other parts of the library, so these category hubs are natural next stops when a task shifts from debugging into conversion, content cleanup, or web implementation.
Developer tools FAQ
What kinds of tools are included here?
This category includes online tools for JSON, XML, Base64, URLs, JWTs, UUIDs, hashing, timestamps, query strings, regex, CSS, JavaScript, SQL, HTML, and related debugging tasks.
Who is this category useful for?
It is useful for developers, QA teams, technical writers, support teams, analysts, and anyone who needs to inspect structured data quickly in the browser.
Why use a category page instead of going straight to one tool?
A category page helps visitors discover related workflows, find the right tool faster, and navigate between formatting, validation, parsing, conversion, and debugging tasks without starting from scratch each time.