JSON Formatter & Validator
format and validate JSON in a browser
Example input
{"name":"b2KIT","private":true,"tools":2769} Tool guides built from real inputs and outputs
These guides explain what each browser tool actually does. Every page includes a concrete example, implementation behavior, useful limits, common questions, and links to the relevant standard or primary reference.
32 checked tools
4 task clusters
32 worked examples
64+ reference links
Task cluster
Developer and data tools
Base64 Encoder / Decoder
encode UTF-8 text as Base64 or decode Base64 text
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b2KIT URL Encoder / Decoder
percent-encode or decode a URL component
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honey & tea JWT Decoder
decode the header and payload of a JSON Web Token
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eyJhbGciOiJub25lIiwidHlwIjoiSldUIn0.eyJzdWIiOiJiZWUyIiwiaWF0IjoxNzAwMDAwMDAwfQ. UUID / GUID Generator
generate cryptographically random UUID version 4 identifiers
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Generate one lowercase UUID with dashes Unix Timestamp Converter
convert Unix seconds or milliseconds to calendar dates
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0 seconds XML to JSON Converter
convert a basic XML document into inspectable JSON
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<note id="7"><to>Bee</to><priority>high</priority></note> YAML to JSON Converter
convert common YAML configuration into JSON
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enabled: true
retries: 3
regions:
- us-east
- eu-west Task cluster
Text and writing tools
Word Counter
count words and inspect basic text statistics
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Small tools save time. Clear tools save more time. Character Counter
count Unicode characters and compare text with a length limit
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b2KIT tools Remove Duplicate Lines
remove repeated lines while preserving the first occurrence
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Bee
Honey
Bee
Honey Code Diff Viewer
compare two text or code blocks line by line
Example input
Original:
const mode = "light";
start();
Modified:
const mode = "dark";
start(); URL Slug Generator
convert a title into a predictable URL path segment
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Cafe Muller: 10 Honey Tools! Sentence Counter
count punctuation-delimited sentences and compare their lengths
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Be clear. Test the result carefully! Ready? Line Counter
count text lines and inspect their length distribution
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alpha
beta gamma Find & Replace in Text
preview and replace literal text or regular-expression matches
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Source: bee2 BEE2 Bee2
Find: bee2
Replace: b2KIT
Case sensitive: off Task cluster
Design and color tools
HEX to RGB Converter
convert a CSS HEX color to RGB and HSL values
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#C49000 Color Picker + HEX/RGB/HSL/CMYK
edit one color across HEX, RGB, HSL, and CMYK-style values
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#C49000 Accessible Color Palette Generator
measure WCAG contrast for a text and background color pair
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Text #000000 on background #FFFFFF Aspect Ratio Calculator
reduce dimensions to an aspect ratio and scale them proportionally
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Width 1920, height 1080 QR Code Generator
create a downloadable QR code for short browser-generated data
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https://b2kit.com/ CSS Gradient Generator
build linear, radial, or conic CSS gradients visually
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Linear, 90 degrees, #C49000 at 0%, #111117 at 100% Box Shadow CSS Generator
compose and preview CSS box-shadow layers
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x 4px, y 4px, blur 16px, spread 0px, black at 25% opacity Color Palette Generator
derive common hue-based palette relationships from one color
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Base #FF0000 Task cluster
Math and conversion tools
Percentage Calculator
calculate a percentage, percentage share, or percentage change
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What is 25% of 80? Ratio Calculator
simplify a ratio and solve a direct proportion
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Ratio 4:6 and equivalent ratio 10:? Date Difference Calculator
measure calendar and elapsed-day differences between two dates
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Start 2026-07-01; end 2026-07-30 Time Duration Calculator
add or subtract two hour-minute-second durations
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Duration A 1h 45m 0s; add Duration B 2h 30m 0s Fraction Calculator
add, subtract, multiply, or divide two fractions and simplify the result
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2/3 + 1/6 Temperature Converter
convert temperature between Celsius, Fahrenheit, and kelvin
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20 degrees Celsius Area Converter
convert common metric and imperial area units
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1 acre Roman Numeral Converter
convert integers from 1 through 3999 to canonical Roman numerals and back
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2026