JSON Formatter
Format, minify, validate, sort keys, stringify, and convert JSON Lines.
DeveloperJabdogu category
Developer
Small utilities for developers
22 toolsQR Code Generator
Turn URLs or text into QR codes and download them as SVG, PNG, or PDF.
DeveloperCSV JSON Converter
Convert CSV to JSON and JSON to CSV directly in your browser.
DeveloperBarcode Generator
Create Code 128 barcodes from product or inventory codes and download SVG or PNG.
DeveloperJWT Decoder
Decode JWT header and payload directly in your browser.
DeveloperRegex Tester
Test regex patterns, flags, groups, and replacements directly in your browser.
DeveloperCron Expression Helper
Parse 5-field cron expressions and preview upcoming run times in KST.
DeveloperLink Preview Checker
Inspect a URL's Open Graph, Twitter Card, title, description, and image to preview social sharing and missing tags.
DeveloperURL Parser
Parse URL protocol, host, path, and query parameters directly in your browser.
DeveloperJSON to TypeScript Generator
Convert JSON samples into TypeScript interfaces and types.
DeveloperPassword Generator
Generate random passwords locally with length and character options.
DeveloperURL Encoder Decoder
Encode, decode, and inspect URL strings and query parameters.
DeveloperColor Contrast Checker
Check WCAG contrast ratio and AA/AAA pass status for HEX, RGB, and HSL text/background colors.
DeveloperUUID Generator
Generate and copy UUID v4 values in your browser.
DeveloperSEO Meta Tag Generator
Generate title, description, Open Graph, Twitter, and JSON-LD tags for search and social sharing.
DeveloperBase64 Encoder Decoder
Encode plain text to Base64 or decode Base64 back to text.
DeveloperUTM Link Builder
Build campaign URLs with UTM parameters for GA4, ads, and marketing links.
DeveloperWebsite Favicon Downloader
Preview and download favicon.ico, Apple touch icon, and favicon service candidates from a website URL.
DeveloperHTML Entity Encoder Decoder
Encode HTML special characters into entities or decode entity strings back to text.
DeveloperRobots.txt Generator
Generate robots.txt rules with crawler allow, disallow, crawl-delay, and sitemap entries.
DeveloperSitemap.xml Generator
Generate sitemap.xml content from a list of URLs for search engine submission.
DeveloperColor Converter
Convert HEX, RGB, and HSL colors and copy the values.
DeveloperCategory Guide
Handle small developer checks in the browser
JSON, URL, JWT, regex, UTM, robots.txt, and sitemap tools help with frequent development checks without opening a separate app.
Paste-based workflow
Load examples or paste your own data, then copy generated or transformed output immediately.
Validate before production
SEO, robots, sitemap, and regex outputs should still be checked against production behavior and official docs.