Dev Tools
Free online developer tools to compare files, compare XML, download public front-end source, build cron expressions, test regex, visualize algorithms, analyze JSON paths, and debug data easily.
Online Clipboard
Paste up to 2 million characters, generate a short ID, and retrieve it for 30 minutes.
JSON Diff
Compare two JSON files and highlight differences instantly for debugging and analysis.
JSON Data Graph
Visualize nested JSON as a zoomable graph, inspect paths and collapse branches while debugging API payloads.
File Diff
Compare files line by line to quickly identify differences and changes.
CSS Validator
Check CSS syntax, duplicate declarations, empty rules, unmatched braces and suspicious selectors.
XML Diff
Compare XML documents side by side with editable panes, inline highlights and previous/next change navigation.
Website Source Downloader
Download accessible public front-end files into a ZIP with index.html, CSS, JS, images and fonts.
Regex Tester
Test JavaScript regular expressions with live matches, flags, groups, and highlighting.
JSONPath Tester
Test JSONPath expressions against JSON data with live results, paths, and filters.
XPath Tester
Evaluate XPath expressions against XML with namespaces, node types, and scalar results.
Cron Expression Generator
Build Quartz cron expressions with seconds, days, months, weekdays, years, and readable summaries.
Sorting Visualiser
Watch sorting algorithms animate with comparisons, swaps, steps, speed control, and generated arrays.
Real Time HTML Editor
Write HTML and see the result update in a live sandboxed preview with line numbers and download controls.
Responsive Website Tester
Preview a website across desktop, tablet, mobile and custom viewport sizes with rotation and zoom controls.
Searching Visualiser
Watch linear, sentinel linear, binary, meta binary, ternary, jump, interpolation, exponential, Fibonacci and best first search animate with probes, ranges and frontiers.
Source Code Viewer
Open the Code Tools source viewer for syntax-highlighted code inspection.
Share Code Snippets
Create local snippet exports and optional small encoded links without uploading code.
API Test
Build REST requests, inspect responses and view formatted JSON with browser CORS limits shown honestly.
Broken Link Checker
Check link lists and extracted HTML links with browser-visible status, CORS and export states.
URL Parser
Inspect URL components and query parameters without making a network request.