Free Online Toolsfor everyday work
100+ handy tools that run entirely in your browser. Fast, private and free.
- 100+
- tools
- 100%
- runs in your browser
- $0
- free forever
Popular Tools
The most-used ones, ready to go
Browse by Category
Covering development, text, images, SEO and more
Developer Tools
Formatters, converters and coding helpers
JSON Formatter
Beautify, minify and validate JSON
JSON Diff
Compare two JSON structures
JSON Escape
Escape and unescape JSON strings
JWT Decoder
Decode JWT header and payload
Regex Tester
Test and debug regular expressions
SQL Formatter
Beautify and normalize SQL
Cron Parser
Explain crontab expressions
JSON to CSV
Convert between JSON arrays and CSV
YAML to JSON
Convert between YAML and JSON
Diff Patch
Generate Git-style unified diffs
XML Formatter
Beautify, minify and validate XML
JSON to TypeScript
Generate interfaces from JSON
URL Parser
Break a URL into parts and params
User-Agent Parser
Detect browser, OS and device
CSS Shadow Generator
Build box-shadow visually
CSS Radius Generator
Build border-radius visually
DNS Lookup
Query A, MX, TXT and other records
Reverse DNS Lookup
Find the hostname behind an IP
What Is My IP
See your public IP and browser info
Chinese ID Validator
Validate and decode Chinese ID numbers
Phone Validator
Validate numbers and detect the carrier
HTTP Status Codes
Look up what each status code means
MIME Type Lookup
Search by file extension or media type
HTML Formatter
Beautify and minify HTML
CSS Formatter
Beautify and minify stylesheets
Subnet Calculator
Network, broadcast and host range from CIDR
SemVer Compare
Sort and compare semantic versions
JSON Pointer Query
Resolve RFC 6901 paths against JSON
Chmod Calculator
Convert between octal and rwx permissions
Text Tools
Count, compare and transform text
Word Counter
Count characters, words and lines
Text Diff
Highlight differences line by line
Case Converter
camelCase, snake_case and more
Markdown Preview
Render Markdown in real time
Dedup & Sort
Remove duplicate lines and sort
Find & Replace
Batch find and replace with regex
Slug Generator
Turn titles into URL-friendly slugs
HTML to Text
Strip tags and extract readable text
Text Sorter
Sort, reverse or shuffle lines
Character Frequency
Count how often each character appears
Text Reverser
Reverse text by character, word or line
Markdown Table Generator
Turn spreadsheet data into Markdown
Whitespace Cleaner
Strip extra spaces, blank lines and invisibles
Line Numbering
Add or remove line numbers
Unicode Normalizer
Unify equivalent forms via NFC, NFD, NFKC or NFKD
Word Wrap
Hard-wrap to a width, counting CJK as double
Encoding & Conversion
Base64, URL, hash, radix and timestamps
Base64 Encode/Decode
Convert between text and Base64
URL Encode/Decode
Encode and decode URL components
Hash Generator
MD5, SHA-1 and SHA-256 hashing
Timestamp Converter
Convert between Unix time and dates
Radix Converter
Binary, decimal and hex conversion
HTML Entity Encode/Decode
Convert HTML characters and entities
Unicode Converter
Convert text to Unicode code points
Hex Encode/Decode
Convert between text and hex bytes
Morse Code
Translate text and Morse code
Caesar Cipher
Letter shift cipher and ROT13
Base32 Encode/Decode
Convert between text and Base32
Punycode Converter
Convert IDN domains to and from ASCII
Roman Numeral Converter
Convert Roman numerals and numbers
ASCII Table
Look up decimal and hex codes for characters
HMAC Generator
Sign a message with an HMAC key
TOTP Code Generator
Time-based one-time codes from a secret
Base64URL Encode/Decode
URL-safe variant, convertible with standard Base64
ISO 8601 Duration Converter
Convert P1DT2H style durations and seconds
Image Tools
Compress, convert, crop and inspect images
Color Tools
Pickers, converters, palettes and contrast
Color Picker
Pick colors and copy any format
Color Converter
Convert HEX, RGB and HSL
Gradient Generator
Build CSS gradients visually
Contrast Checker
Check WCAG color contrast
Color Palette
Build palettes from a base color
Color Blindness Sim
Preview colors as color-blind users see
Random Color Generator
Generate random colors by style
CSS Color Names
Browse all 148 named CSS colors
Calculators
Units, finance, health and date math
Unit Converter
Length, weight, temperature and more
BMI Calculator
Body mass index from height & weight
Loan Calculator
Monthly payment and total interest
Date Calculator
Days between two dates
Percentage Calculator
Percentages, change and ratios
Income Tax Calculator
Salary tax and take-home pay
Age Calculator
Exact age from a birth date
Compound Interest
Compound growth and contributions
Statistics Calculator
Mean, median, standard deviation and more
RMB Amount in Words
Write an amount in formal Chinese
Aspect Ratio Calculator
Scale dimensions and keep the ratio
Workday Calculator
Count workdays, skipping weekends and holidays
GCD and LCM Calculator
Greatest common divisor and least common multiple
SEO Tools
Meta tags, SERP preview, structured data
Meta Tag Generator
Generate SEO and social tags
SERP Preview
Preview how you appear in search
Schema Generator
Generate JSON-LD structured data
robots.txt Generator
Build robots.txt visually
Keyword Density
Analyze keyword frequency in text
UTM Builder
Append UTM tracking params to a URL
Sitemap Generator
Build sitemap.xml from a URL list
Hreflang Generator
Generate hreflang tags for i18n pages
Heading Outline
Extract the H1-H6 tree and find level gaps
Generators
Passwords, QR codes, UUIDs and mock data
Password Generator
Generate secure random passwords
QR Code Generator
Turn text or links into QR codes
UUID Generator
Generate UUIDs / GUIDs in bulk
Lorem Ipsum
Generate placeholder text
Random Number
Generate random integers in a range
Placeholder Image
Generate placeholder images of any size
Barcode Generator
Generate Code 128 barcodes
Mock Data Generator
Generate fake data for testing
Card Number Validator
Luhn check and card brand detection