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bii ToolsBox — 50 Free Tools
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🛠 bii ToolsBox v1.0
50 powerful free online tools — no signup, no data collection, 100% browser-based
Total Tools
50
↑ All free
Used Today
0
↑ Great!
Privacy
100%
Local only
Rating
5.0
★★★★★
Text Case Converter
Convert text to UPPER, lower, Title, camelCase, snake_case and more
Input Text

Type or paste your text

Result

Converted text

Result will appear here...
0
Chars
0
Words
0
Lines
0
Sentences
Word Counter
Real-time word, character, sentence & reading time stats
Your Text

Type to see live stats

Statistics

Live analysis

0
Words
0
Characters
0
No Spaces
0
Sentences
0
Paragraphs
0
Read (min)
0
Speak (min)
0
Unique Words
0
Avg Word Len
TOP KEYWORDS
Start typing...
Lorem Ipsum Generator
Generate placeholder text for mockups and designs
Settings

Configure output

Click Generate to create placeholder text...
Text Diff Checker
Highlight differences between two texts word by word
Compare Texts

Paste two texts to compare

Markdown Preview
Write Markdown and see a live rendered HTML preview
Markdown Input

Write markdown

Preview

Live rendered output

Quick NotePad
Rich text notepad — auto-saves to your browser localStorage
NotePad

Auto-saves automatically

Start typing your notes here...
Not saved yet
Find & Replace
Search and replace text with optional regex support
Input

Paste your text

Result

After replacement

Result appears here...
Character Frequency Analyzer
Analyze how often each character appears in your text
Input

Enter text to analyze

Frequency Chart

Character distribution

Enter text to analyze...
Duplicate Line Remover
Remove duplicate lines from text, lists or data
Input

One item per line

Result

Unique lines only

Result appears here...
Text Line Sorter
Sort, reverse, shuffle, or number lines of text
Input

One item per line

Result

Sorted output

Result appears here...
Hash Generator
Generate SHA-1, SHA-256, SHA-384, SHA-512 cryptographic hashes
Hash Generator

Secure one-way cryptographic functions

Base64 Encode / Decode
Encode or decode Base64 strings instantly
Input

Plain text or Base64

Output

Encoded / decoded result

Result...
URL Encoder / Decoder
Encode special characters in URLs or decode percent-encoded URLs
Input

URL or encoded string

Output

Encoded / decoded URL

Result...
Encode/decode a URL with query params to see them parsed here.
Password Generator
Generate cryptographically secure random passwords
Settings

Customize your password

Result

Your secure password(s)

STRENGTH
RECENT PASSWORDS
UUID Generator
Generate RFC 4122 compliant UUIDs — v1, v4, and v5 variants
UUID Generator

Universally Unique Identifiers

JWT Decoder
Decode and inspect JSON Web Tokens (header, payload, signature)
JWT Decoder

Paste any JWT token to inspect it

Unit Converter
Convert length, weight, temperature, area, speed, data, energy, pressure, volume
Unit Converter

Select category and enter value

Number Base Converter
Convert between Binary, Octal, Decimal, Hexadecimal, and Base-32/64
Number Base Converter

All conversions simultaneously

JSON Formatter & Validator
Format, validate, minify and explore JSON data with tree view
Raw JSON

Paste your JSON

Formatted Output

Pretty-printed JSON

Output...
CSV → JSON Converter
Convert CSV or Excel-like data to structured JSON
CSV Input

Paste your CSV

Delimiter:
JSON Output

Converted result

JSON...
Color Picker & Converter
Pick colors and convert between HEX, RGB, HSL, CMYK, HSV
Color Input

Pick or enter a color

Swatches & Palette

Tints, shades, and more

QUICK SWATCHES
TINTS (lighter)
SHADES (darker)
Roman Numeral Converter
Convert between Arabic numbers and Roman numerals (1–3999)
Arabic → Roman

Enter a number 1–3999

Roman → Arabic

Enter a Roman numeral

QUICK REFERENCE
I = 1
V = 5
X = 10
L = 50
C = 100
D = 500
M = 1000
max 3999
Currency Converter
Convert between major world currencies using static reference rates
Currency Converter

Static reference rates — for indicative use only

Enter an amount to convert
QUICK CONVERSION TABLE (1 base → all)
Static reference rates. For live rates please use a financial API.
Time Zone Converter
Convert date and time between world time zones
Time Zone Converter

Convert time across the world

Image Resizer & Compressor
Resize, compress and convert images — all in the browser, zero uploads
Upload Image

Click or drag & drop

Click to upload or drag & drop

PNG, JPG, WEBP, GIF, BMP

Preview

Result

Upload an image
CSS Gradient Generator
Build beautiful CSS gradients visually with live code output
Customize

Build your gradient

0%
50%
100%
PRESETS
Preview & Code

Live preview

background: linear-gradient(...);
Tailwind class...
QR Code Generator
Generate custom QR codes from any URL, text, email, or phone number
Settings

Configure your QR code

Preview

Your QR code

QR code appears here
Image → Base64 Converter
Convert images to Base64 strings for embedding in CSS, HTML, or JSON
Upload Image

Convert to Base64

Click to upload or drag & drop

All image formats supported

Base64 Output

Ready to use in code

Upload an image...
Color Palette Generator
Generate harmonious color palettes — complementary, triadic, analogous, etc.
Palette Generator

Color theory-based palettes

Favicon Generator
Generate a favicon from text, emoji, or custom design
Design

Create your favicon

Preview

All sizes

16px
32px
64px
128px
Scientific Calculator
Full-featured calculator with history and keyboard support
Calculator

Standard & scientific

0
History

Recent calculations

Click result to use it
Percentage Calculator
Multiple percentage calculation modes — discount, increase, decrease, tips
Percentage Calculator

All percentage operations

① What is X% of Y?
% of
② X is what % of Y?
is what %
③ Percentage Change
④ Discount Calculator
Age Calculator
Calculate your exact age in years, months, days, hours, minutes and seconds
Age Calculator

Precise age breakdown

Date Difference Calculator
Find the exact difference between two dates in days, weeks, months, and years
Date Difference

Between two dates

Loan / EMI Calculator
Calculate monthly EMI, total interest, and full amortization schedule
Loan Details

Enter your loan information

Results

Loan breakdown

Fill in details and click Calculate
BMI Calculator
Calculate Body Mass Index with health category and visual indicator
Your Measurements

Enter your details

Results

Your BMI analysis

Enter your details and calculate
Tip Calculator
Calculate tip amount and split the bill among multiple people
Bill Details

Enter bill info

Results

Breakdown per person

$0.00
Tip Amount
$0.00
Total Bill
$0.00
Tip / Person
$0.00
Total / Person
Regex Tester
Test regular expressions with live match highlighting and group extraction
Regex Tester

Pattern matching in real-time

/ /
0 matches
Enter pattern and test text...
URL Slug Generator
Convert any text to SEO-friendly URL slugs and identifiers
Input

Enter text to slugify

Generated Slug

Variations

Slug appears here...
ALL VARIATIONS
HTML Encoder / Decoder
Encode HTML special characters to entities or decode them back
Input

HTML or plain text

Output

Encoded / decoded result

Result...
COMMON HTML ENTITIES
& = &
< = &lt;
> = &gt;
" = &quot;
' = &apos;
© = &copy;
® = &reg;
™ = &trade;
€ = &euro;
JSON → CSV Converter
Convert JSON arrays to CSV format — downloadable as a file
JSON Input

Array of objects

Delimiter:
CSV Output

Converted result

CSV...
CSS Beautifier / Minifier
Format messy CSS code or minify it for production use
CSS Input

Paste your CSS

Output

Formatted CSS

Output...
SQL Formatter
Format and beautify SQL queries for readability
SQL Input

Paste your SQL

Formatted SQL

Readable query

Output...
Timer & Stopwatch
Countdown timer with alarm and stopwatch with lap tracking
Countdown Timer

Set and start a timer

00:00:00
Stopwatch

Measure elapsed time with laps

00:00:00.000
Invoice Generator
Create professional invoices with tax, discount support — printable & downloadable
Invoice Details

Fill in all fields

Total: $0.00
Invoice Preview

Live preview

Fill in details and click Preview
Morse Code Converter
Convert text to Morse code and decode Morse code back to text
Input

Text or Morse code

Output

Converted result

Result...
MORSE REFERENCE CHART
Password Strength Checker
Analyze your password security and get improvement suggestions
Check Password

Analyze strength

STRENGTH
Analysis

Detailed breakdown

Enter a password to analyze
SEO Meta Tag Generator
Generate HTML meta tags for SEO, Open Graph, and Twitter Cards
Page Information

Fill in your details

0/60
0/160
Generated Meta Tags

Copy into your HTML <head>

GOOGLE SEARCH PREVIEW
Page Title Here
https://yoursite.com
Meta description will appear here...
Tags appear here...
Random Picker & Dice Roller
Pick random items from a list, roll dice, or generate random numbers
Random List Picker

One item per line

Dice Roller & Random Number

Roll dice or generate numbers

DICE ROLLER
Roll the dice!
RANDOM NUMBER GENERATOR
JSON Schema Validator
Validate JSON against a schema, view structure, and detect errors