JSON Formatter
JSON Formatter helps you format JSON with readable spacing and indentation in the browser for reviewing API payloads, debugging responses, or preparing JSON for documentation.
Open tool pageFree Browser-Based Developer Tools
This hub groups the developer-focused utilities on the site so you can move between payload review, encoding, formatting, token inspection, and parser checks without leaving the browser.
Why this hub exists
This hub groups the developer-focused utilities on the site so you can move between payload review, encoding, formatting, token inspection, and parser checks without leaving the browser.
These hubs are designed to capture broader topic intent, then distribute that attention into the individual tool pages and long-tail guides that do the actual job.
Featured tools in this topic
Use these direct tool links when you already know the task you need to complete.
JSON Validator
JSON Validator helps you check whether JSON is valid and identify parsing issues in the browser for debugging payloads, testing API responses, or reviewing copied configuration data.
Open tool pageXML Validator
XML Validator helps you check whether XML parses correctly in the browser so you can catch broken tags, invalid nesting, and parser errors before XML moves into a feed, import, or integration workflow.
Open tool pageXML Formatter
XML Formatter helps you beautify XML directly in the browser so feeds, config files, and integration payloads are easier to scan, debug, and share with other people on your team.
Open tool pageURL Parser
URL Parser helps you break a URL into readable parts in the browser so you can inspect query parameters, confirm paths, and debug how an address is structured before you reuse it in code, analytics, or content.
Open tool pageHTTP Header Parser
HTTP Header Parser helps you turn raw HTTP headers into a structured summary in the browser so request blocks and copied response headers are easier to inspect during debugging, QA, and documentation work.
Open tool pageJWT Generator
JWT Generator helps you build a JWT in the browser from header and payload JSON, which is useful for local testing, auth demos, and reviewing how token parts are encoded before they are sent anywhere else.
Open tool pageJWT Decoder
JWT Decoder helps you decode a JWT so you can inspect its parts in the browser for reviewing token payloads, debugging auth flows, or checking claims during development.
Open tool pageBase64 URL Encoder
Base64 URL Encoder helps you encode text with URL-safe Base64 characters in the browser so query values, token parts, and compact payloads can be reused without standard Base64 characters that often need escaping.
Open tool pageBase64 URL Decoder
Base64 URL Decoder helps you decode URL-safe Base64 text in the browser so token parts, compact payloads, and encoded query values can be reviewed without switching tools.
Open tool pageQuery String Parser
Query String Parser helps you turn a query string into readable key/value pairs in the browser so campaign links, redirect parameters, and API query strings are easier to inspect and debug.
Open tool pageQuery String Builder
Query String Builder helps you build a query string from key/value lines in the browser so you can assemble links, redirect parameters, and filter states without hand-encoding every value.
Open tool pageCSS Formatter
CSS Formatter helps you beautify CSS in the browser so compressed styles, copied snippets, and quick experiments are easier to read before they move back into a stylesheet or design handoff.
Open tool pageJavaScript Formatter
JavaScript Formatter helps you beautify JavaScript in the browser so compact snippets, inline scripts, and copied code are easier to review before they go back into an editor or documentation page.
Open tool pageGuides and comparisons in this cluster
Use these supporting pages to move from the broader topic into a task-specific guide or a comparison that narrows the next tool choice.
FAQ
What counts as a browser-based developer tool here?
These are static tools that help with code-adjacent tasks such as formatting, parsing, encoding, validation, and lightweight payload inspection directly in the browser.
Why is this useful for internal linking?
A focused hub gives search engines and users a clear path into the site’s developer cluster instead of relying on one large tools list.
Do I need to install anything to use these tools?
No. The tools are designed to run in the browser without a separate install flow.