29available tools
Free, fast utilities available without creating an account.
Category
Development
Format, analyze, and generate technical data used in web development, APIs, JSON, XML, and automation.
29 tools available
8subcategories
Clear families that help you find the right operation quickly.
29embeddable widgets
The same tools ready to embed directly on your own website.
Why this category?
Why use development tools?
These tools reduce manual work during development and debugging. They help verify structures, produce reproducible examples, and convert data without installing another environment.
Most operations run entirely in the browser. You can therefore work with technical data, tokens, or API examples without creating an account or installing an extension.
Use cases
Debug an API
Inspect JSON, JWTs, HTTP headers, URLs, and query parameters.
Generate code
Create cURL commands, Fetch requests, identifiers, and technical structures.
Normalize formats
Format, minify, or convert JSON, XML, YAML, SQL, and related syntax.
Browse by subcategory
All tools
Structured formats
Work with JSON, XML, YAML, and other structured formats.
Development
JSON formatter
Format, minify, and validate JSON to make it easier to read or more compact.
100% localFeatured
Use this toolDevelopment
YAML formatter
Format and validate a YAML document to improve readability and detect common errors.
100% local
Use this toolDevelopment
XML formatter
Format, minify, and validate an XML document directly in your browser.
100% local
Use this toolDevelopment
JSON and YAML converter
Convert JSON data to YAML or YAML data to JSON directly in your browser.
100% local
Use this toolDevelopment
JSON and XML converter
Convert JSON data to XML or XML data to JSON directly in your browser.
100% local
Use this toolDevelopment
JSON Schema validator
Validate a JSON document against a schema and locate every error precisely.
100% local
Use this toolDevelopment
Generate JSON Schema
Generate a JSON Schema from a JSON example locally in your browser.
100% localNew
Use this toolDevelopment
JSON comparator
Compare two JSON documents and highlight structural differences.
100% local
Use this toolDevelopment
JSON to TypeScript Pro
Generate TypeScript interfaces, types, Zod schemas, or JSON Schema from sample JSON.
100% localFeatured
Use this toolFormatting & code
Format, minify, and prepare code or technical syntax.
Development
HTML formatter and minifier
Format or minify HTML to improve readability or reduce file size.
100% local
Use this toolDevelopment
CSS formatter and minifier
Format or minify CSS to improve readability or reduce file size.
100% local
Use this toolDevelopment
SQL formatter
Format or minify SQL queries to improve readability or reduce their size.
100% local
Use this toolDevelopment
JavaScript formatter
Format or minify JavaScript to improve readability or produce a more compact version.
100% local
Use this toolAPI & HTTP
Build and inspect requests, commands, and HTTP headers.
Development
cURL Builder
Generate a complete cURL command from an HTTP request.
100% local
Use this toolDevelopment
HTTP Header Builder
Build custom HTTP headers and get output ready to use in your requests.
100% local
Use this toolDevelopment
API Request Builder
Build a complete HTTP API request with method, URL, parameters, headers, and body.
100% local
Use this toolDevelopment
HTTP Header Analyzer
Analyze HTTP headers to review security, caching, CORS, and cookie behavior.
100% local
Use this toolQueries & expressions
Test regular expressions, XPath, and similar queries.
Development
Regular expression tester
Test a regular expression against text and inspect the matches it returns.
100% local
Use this toolDevelopment
JSONPath tester
Query JSON data with a simple JSONPath expression.
100% local
Use this toolDevelopment
XPath tester
Test an XPath expression against XML and immediately inspect the matching results.
100% local
Use this toolDeveloper generators
Create test data and technical values for development.
Development
Data Faker
Generate realistic fake datasets in JSON, CSV or SQL.
100% localFeatured
Use this toolGit & environment
Prepare files and settings for development environments.
Development
.gitignore generator
Create a .gitignore file from presets for your technologies and tools.
100% local
Use this toolSystem & files
Work with permissions, line endings, and system information.
Development
Unix permissions calculator
Convert Unix permissions between octal and symbolic notation and generate a chmod command.
100% local
Use this toolDevelopment
MIME type lookup
Find a MIME type from an extension or the other way around.
100% local
Use this toolDevelopment
Line ending converter
Convert text between LF, CRLF and CR line endings.
100% local
Use this toolEncoding & identifiers
Encode data and generate technical identifiers.
Development
Base64 encoder and decoder
Encode text as Base64 or decode a Base64 string back to its original content.
100% local
Use this toolDevelopment
UUID generator
Generate one or more random UUID v4 identifiers instantly and copy them when needed.
100% local
Use this toolDevelopment
HTML entity encoder and decoder
Encode or decode common HTML entities to convert special characters in text.
100% local
Use this toolDevelopment
Cron expression builder
Build a standard cron expression, understand it and preview its next execution times.
100% local
Use this toolAll these tools are also available as widgets
Add tools from this category to WordPress, Webflow, Wix, or any HTML page with the same local processing.
Frequently asked questions
Are my data uploaded?
No. Compatible tools process the entered data locally in your browser.
Can these tools be embedded?
Yes. Available widgets can be added to your website with embed code.
Do I need an account?
No account is required to use the public tools in this category.