All Tools
All tools organized by category.
Developer Tools
JSON Formatter / Validator
Format, validate, and minify JSON in your browser. Syntax highlighting, line numbers, and error reporting. No data sent to server.
Use Tool →Base64 Encoder / Decoder
Encode, decode, and validate Base64 in your browser. Supports text, files, images, Data URLs, and URL-safe Base64. No data sent to server.
Use Tool →JWT Decoder / Inspector
Decode, inspect, and verify JWT tokens in your browser. View header, payload, claims, expiration, and verify HMAC signatures. No data sent to server.
Use Tool →Regex Tester / Editor
Test, visualize, replace, and explain regular expressions in your browser. Match highlighting, capture groups, replacement preview, pattern explainer, and cheat sheet. No data sent to server.
Use Tool →Network Tools
IP Address Checker
Check your public IP address, location, ISP, and connection details instantly. No data stored.
Use Tool →CIDR / Subnet Visualizer
Visualize, split, aggregate, and diff CIDR blocks. VLSM planner, longest-prefix lookup, reverse DNS zone generation, and RFC badge detection. IPv4 and IPv6.
Use Tool →Generators
QR code generator for part marking
Stack metal glare, dust, oil film, and scratches in as many layouts as you need. Use it for scan tests on the shop floor.
Use Tool →Operator panel and HMI color review toolkit
Review the colors and contrast of text, bezels, and grids on an operator panel or HMI. You can pick from a photo, and copy several formats.
Use Tool →Token Generator
Generate cryptographically secure tokens in Hex, Base64, Base58, or URL-safe format. All processing happens in your browser.
Use Tool →Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512, SHA-3 hashes and HMAC from text or files. 100% browser-based, nothing sent to servers.
Use Tool →Hash Compare
Compare two hash values side by side with character-level diff highlighting. Verify file integrity instantly.
Use Tool →Logo ASCII for source and README
Turn a logo or icon into a block you can paste into a file or README. Comment it out and keep it inside the line width.
Use Tool →ASCII banner generator for source and README
Turn a short name into a heading you can paste into a file or README. Wrap it as comments and keep it inside the line width.
Use Tool →Converters
Travel unit converter
Convert miles, Fahrenheit, gallons, and local money as you type — for a trip.
Use Tool →Text Case Converter
Convert text between UPPERCASE, lowercase, Title Case, Sentence case, and more. Custom rules for camelCase, snake_case, and advanced transformations. 100% browser-based.
Use Tool →Date & Time
World Timezone Map
Interactive world map with real-time day/night boundary and local times for major cities. Powered by your browser clock — no server needed.
Use Tool →World Timezone List
Compare time differences between cities worldwide with an interactive timezone list.
Use Tool →Age and a guide to filings
From your date of birth, see typical windows for passports, visas, contracts, and other applications — including the days before and after. Recheck what the birthday itself actually marks.
Use Tool →Image Tools
Image Resizer / Compressor / Converter
Resize, compress, and convert images online. Pixel, percentage, and fit-within modes. Social media presets, batch processing, and format conversion. 100% browser-based.
Use Tool →Image Annotation Editor
Draw rectangles and polygons on images, tag labels, and export to JSON, COCO, or YOLO format. Real-time JSON editor sync. 100% browser-based.
Use Tool →Document Tools
Engineering PDF Toolkit
Merge, split, and rotate PDFs for equipment manuals, inspection packs, and drawing sets. Files stay in server memory and are discarded with the response.
Use Tool →Text Analyzer
Count words, characters, and lines. Spot invisible characters and homoglyph look-alikes on a live minimap. Search and replace with regex. Optional server-side readability and word-frequency analysis. 100% browser-based for the basics.
Use Tool →Engineering calculations
Plant siting
Similar but Different Country Finder
Pick a country and discover others that are similar in one stat yet different in another — population, area, GDP, health, and 25+ indicators. Results are dealt as explorable cards.
Use Tool →Similar but Different US State Finder
Pick a US state and discover others that are similar in one stat yet different in another — population, income, home values, and 17 indicators. Includes DC and Puerto Rico.
Use Tool →Earthquake History Map
Scrub through a century of significant earthquakes and tsunamis on an interactive world map. Circle size shows magnitude, human figures show casualties. Auto-play the timeline and watch history unfold.
Use Tool →Hurricane & Typhoon History Map
Watch four decades of hurricanes, typhoons, and cyclones trace their paths across a world map. Track colors show intensity. Scrub the timeline or let it play.
Use Tool →Wildfire History Map
Watch two decades of large wildfires flare up across an interactive world map. Circle size shows burned area, color shows how long each fire burned. Scrub the timeline or let it play.
Use Tool →Volcano Eruption History Map
Explore significant volcanic eruptions from antiquity to today on an interactive world map. Circle size and color show explosivity (VEI), with plate boundaries and earthquake overlays. Scrub the timeline or let it play.
Use Tool →Meteorite History Map
Explore 32,000 recorded meteorites on an interactive world map — observed falls in orange, desert and Antarctic finds in blue, circle size by mass. Includes a recent-fireball layer. Scrub the timeline or let it play.
Use Tool →