Developer & Utility Tools
Browse all 75 free developer and utility tools on 11zon — JSON and CSV converters, QR code and barcode generators, hash and base64 tools, calculators, text utilities, password generators and more. Fast, free, no sign-up.
Create ZIP
Create ZIP files online — pack & download, free
Extract ZIP
Extract ZIP files online — peek, unpack, download, free
Base64 Encoder/Decoder
Base64 encode & decode — instant conversion, free
URL Encoder/Decoder
URL encode & decode — clean links & queries, free
File Hash Generator
File hash generator — MD5, SHA-1, SHA-256, free
QR Code Generator
Generate QR codes online — instant PNG download, free
Barcode Generator
Generate barcodes online — print-ready PNG, free
Word Counter
Word counter — words, characters & sentences, free
Password Generator
Strong password generator — random & secure, free
File Info
File info checker — true type, size & details, free
PDF Info Viewer
PDF info viewer — pages, size & version, free
Text Case Converter
Text case converter — UPPER, lower, Title, free
Unit Converter
Unit converter — metric to imperial, instant & free
JSON Formatter
Format, validate and minify JSON instantly
Timestamp Converter
Convert Unix timestamps to dates and back
Age Calculator
Calculate exact age in years, months and days
Percentage Calculator
X% of Y, percent change and more — live
Date Difference
Days, weeks and business days between two dates
UUID Generator
Bulk UUID v4 generation with format options
Diff Checker
Compare two texts line by line
Regex Tester
Test regular expressions with live highlighting
JWT Decoder
Decode JWT headers and payloads safely
URL Parser
Split any URL into protocol, host, path and query
Color Converter
HEX, RGB and HSL — converted live
HTML Entities
Escape text for HTML and decode entities back
CSV to JSON
Convert CSV data to clean JSON arrays
Slug Generator
Turn titles into SEO-friendly URL slugs
Cron Explainer
Understand cron expressions in plain English
Lorem Ipsum Generator
Placeholder text for designs and mockups
Text Repeater
Repeat any text up to 10,000 times
HTML Table to CSV
Paste HTML, get properly escaped CSV
HTML Table to JSON
Tables to pretty JSON with header keys
Sort & Deduplicate
Clean lists: sort, dedupe, reverse, shuffle
Markdown Preview
Live side-by-side markdown editor
Word Frequency Counter
Top keywords with live frequency bars
HTML Table to Markdown
Tables to GitHub-flavoured markdown
Number to Words
Numbers to words — lakh, crore or million
Aspect Ratio Calculator
Resize while keeping the exact ratio
HTML Stripper
Remove tags, keep readable text
Random Line Picker
Pick random winners from any list
Text to Binary
Text ↔ binary with real UTF-8 encoding
Word Wrap
Wrap text at any character width
Morse Code Translator
Text ↔ morse code, both directions
Roman Numeral Converter
Numbers ↔ Roman numerals, both ways
Character Inspector
Unicode code points, bytes and blocks
Sort by Length
Shortest to longest — or the reverse
Line Numbers Adder
Number every line — dot, colon or paren
Reverse Text
Reverse characters, words or lines
Remove Line Breaks
Join broken lines into flowing text
Caesar Cipher
Encode, decode and brute-force any shift
Tab to Spaces Converter
Column-aware tab and space conversion
HTML Minifier
Smaller HTML — comments and whitespace out
HTML Table to LaTeX
Tables to LaTeX tabular blocks
BOM Remover
Strip invisible BOM and zero-width characters
Alphabetical Sort
Sort lines or words A to Z
Number Base Converter
Decimal, binary, octal, hex — all at once
Random Number Generator
Crypto-grade random numbers in any range
Tip Calculator
Bill, tip and per-person split — live
Epoch Converter
Convert Unix timestamps to readable dates
JSON to CSV Converter
Convert JSON arrays to CSV format
Duplicate Line Remover
Remove duplicate lines with count stats
Email Extractor
Extract all email addresses from text
URL Extractor
Extract all URLs from text
Character Frequency
Count frequency of each character
Whitespace Cleaner
Remove extra spaces and normalise breaks
Unicode Escape
Escape text to Unicode sequences
ASCII Code Converter
Get ASCII/Unicode code values
Line Prefix & Suffix
Add bullet points to each line
Number Formatter
Format numbers with thousand separators
Percentage Change
Calculate % change between values
Text Statistics
Detailed text analytics dashboard
CSV Column Extractor
Extract specific columns from CSV
Letter Frequency
Analyse letter frequency with bars
Phone Number Extractor
Extract phone numbers from text
Mock Data Generator
Generate fake user data for testing
Popular picks: JSON Formatter, QR Code Generator, Word Counter, Base64 Codec, Password Generator and Unit Converter.
