Developer Tools
Format, validate, encode, and convert developer-facing text in your browser without extra setup. ExtFormatTools keeps these utility pages organized into stable groups for easier discovery, including quick SEO and web checks.
21
tools in this category
4
directory groups already mapped for future growth
3
core use directions shown before the tool list
Start with the most used tools
If you are not sure where to begin, these are the easiest entry points.
JSON Formatter
Beautify JSON for easier reading, debugging, and review.
JSON ValidationJSON Validator
Validate JSON instantly and return formatted output when the input is valid.
JSON ValidationTitle Tag Checker
Check SEO title length and clean up titles before publishing.
Web & SEOExtract Meta Tags
Extract title, description, canonical, robots, and Open Graph tags from HTML.
Web & SEOWhat people usually do here
Use this category page as a short path to the job you need to finish.
Check structured data quickly
Format and validate JSON when you need to inspect payloads, configs, or copied API data.
Handle encoding and ID tasks
Encode values, generate UUIDs or passwords, and finish lightweight utility steps without leaving the browser.
Review web and SEO markup
Check title tags, meta descriptions, links, slugs, and other lightweight page metadata during QA or audits.
Browse the directory by group
This mirrors how larger tool sites grow: keep the top-level page stable, then let visitors jump into the right subgroup when the directory gets bigger.
JSON & Data
Format, validate, and convert structured data for development work.
Encoding & IDs
Encode values, generate identifiers, and handle utility output.
Developer Formatting
Regex, escaping, diffing, and text prep for technical workflows.
Time & Web
Timestamp tools, URL cleanup, and SEO-facing helpers for lightweight web work.
JSON & Data
Format, validate, and convert structured data for development work.
JSON Validation
3 tools in this subgroup.
Encoding & IDs
Encode values, generate identifiers, and handle utility output.
Encoding & Decoding
2 tools in this subgroup.
Developer Formatting
Regex, escaping, diffing, and text prep for technical workflows.
Escaping & Testing
4 tools in this subgroup.
Regex Tester
Test regular expressions in a focused browser workflow.
Escaping & TestingHTML Escape
Escape HTML special characters for safe display in markup.
Escaping & TestingHTML Unescape
Convert escaped HTML entities back into readable characters.
Escaping & TestingStrip HTML Tags
Remove HTML tags from pasted markup and keep readable text.
Escaping & TestingComparison & Review
1 tools in this subgroup.
Time & Web
Timestamp tools, URL cleanup, and SEO-facing helpers for lightweight web work.
Time Conversion
1 tools in this subgroup.
Web & SEO
6 tools in this subgroup.
Text to Slug
Convert text to URL-friendly slugs for SEO and web development.
Web & SEOTitle Tag Checker
Check SEO title length and clean up titles before publishing.
Web & SEOMeta Description Checker
Check meta description length and clean up snippets before publishing.
Web & SEORemove URL Parameters
Remove query parameters from URLs for cleaner sharing and SEO reviews.
Web & SEOExtract Links From HTML
Extract href links from HTML for audits, migrations, and page reviews.
Web & SEOExtract Meta Tags
Extract title, description, canonical, robots, and Open Graph tags from HTML.
Web & SEOFind the right developer tools
Search by task, tool name, category, or tag to jump straight to the page you need.
JSON Formatter
Beautify JSON for easier reading, debugging, and review.
JSON & DataJSON Validator
Validate JSON instantly and return formatted output when the input is valid.
JSON & DataRegex Tester
Test regular expressions in a focused browser workflow.
FormattingBase64 Encoder / Decoder
Encode and decode Base64 text instantly in your browser.
EncodingURL Encoder / Decoder
Encode and decode URLs instantly for web development tasks.
EncodingPassword Generator
Generate random passwords for quick security and testing needs.
EncodingUUID Generator
Generate UUIDs instantly for application and database workflows.
EncodingTimestamp Converter
Convert Unix timestamps into readable dates and times.
Time & WebJSON to CSV Converter
Convert JSON data into CSV format for spreadsheets and exports.
JSON & DataCSV to JSON Converter
Convert CSV data into JSON format for apps and APIs.
JSON & DataHTML Escape
Escape HTML special characters for safe display in markup.
FormattingHTML Unescape
Convert escaped HTML entities back into readable characters.
FormattingText Diff Checker
Compare two blocks of text and check differences quickly.
FormattingText to Slug
Convert text to URL-friendly slugs for SEO and web development.
Time & WebJSON Minifier
Minify JSON instantly for APIs, embeds, and payload cleanup.
JSON & DataStrip HTML Tags
Remove HTML tags from pasted markup and keep readable text.
FormattingTitle Tag Checker
Check SEO title length and clean up titles before publishing.
Time & WebMeta Description Checker
Check meta description length and clean up snippets before publishing.
Time & WebRemove URL Parameters
Remove query parameters from URLs for cleaner sharing and SEO reviews.
Time & WebExtract Links From HTML
Extract href links from HTML for audits, migrations, and page reviews.
Time & WebExtract Meta Tags
Extract title, description, canonical, robots, and Open Graph tags from HTML.
Time & WebNo developer tools matched that search. Try a broader keyword or browse the grouped directory above.
About this category
This page keeps the current URL structure intact while adding a scalable classification layer under the surface.
- The developer tool index now has internal groups for JSON & data, encoding & IDs, developer formatting, and time & web or SEO helpers.
- Tool URLs remain unchanged, which protects current internal links, search indexing, and bookmarks.
- This gives you a clear path to grow toward a larger multi-category directory later without replatforming the site.