Tools
Powerful online tools to make your work easier.
Developer utilities, finance calculators, health trackers and brain games — all in one place, free and private.
All Tools
424 tools available
Base64 Converter
Encode and decode Base64 strings online.
URL Encode / Decode
URL encode and decode text.
HTML Entities
HTML entity encode and decode.
Unicode Converter
Encode and decode Unicode escape sequences.
Hex Converter
Convert text to and from hexadecimal.
Binary Converter
Convert text to and from binary.
ASCII Converter
Convert text to and from ASCII codes.
UTF-8 Converter
Encode and decode UTF-8 byte sequences.
ROT13 Cipher
Encode and decode text with the ROT13 cipher.
Shell Escape
Escape strings for bash, shell and the command line.
Morse Code
Convert text to and from Morse code.
UUID Generator
Generate UUID v4 identifiers.
QR Code Generator
Generate QR codes instantly.
Lorem Ipsum
Generate placeholder text.
Password Generator
Create secure random passwords.
Nano ID Generator
Generate compact unique IDs.
Slug Generator
Create URL-friendly slugs.
Random String Generator
Generate random alphanumeric strings.
Color Picker
HEX/RGB/HSL color picker.
CSS Gradient
Create gradient CSS backgrounds.
Color Contrast Checker
Check WCAG contrast ratios.
Color Palette Generator
Generate harmonious color palettes.
Flexbox Generator
Visual CSS flexbox layout generator.
CSS Grid Generator
Visual CSS grid layout generator.
Box Shadow Generator
Generate CSS box-shadow styles visually.
Border Radius Generator
Generate CSS border-radius styles visually.
Color Converter
Convert colors between HEX, RGB, HSL and CMYK.
Tailwind Color Generator
Generate Tailwind CSS color palette configs.
JSON Formatter
Format, validate and minify JSON.
JSON Schema Generator
Generate JSON Schema from JSON data.
JSON to Code
Convert JSON to TypeScript, Go, Rust, Kotlin, Dart.
Mock Data Generator
Generate fake JSON data, mocks and fixtures.
Timestamp Converter
Convert between Unix time and human dates.
Hash Generator
Generate MD5, SHA-1, SHA-256 and SHA-512 hashes.
Number Base Converter
Convert between decimal, hex, binary and octal.
Timezone Converter
Convert time between different timezones.
JSON ↔ YAML
Convert JSON to and from YAML.
CSV to JSON
Convert CSV data to JSON.
JSON Compare
Compare and diff two JSON objects.
JSON Escape
Escape and unescape JSON strings.
JSON Sort
Sort JSON object keys alphabetically.
JSON to CSV
Convert a JSON array to CSV format.
JSON Flatten
Flatten nested JSON to dot-notation keys.
JSON ↔ XML
Convert between JSON and XML formats.
JSON to TOML
Convert JSON to TOML config format.
JSON Tree Viewer
Visualize JSON structure as a tree.
HTML Preview
Preview HTML code in real time.
Chmod Calculator
Calculate Unix file permissions and chmod values.
LLM Token Counter
Count tokens for OpenAI, Claude and Gemini models.
Prompt Tools
Format and optimize LLM prompts.
JWT Decoder
Decode JSON Web Tokens.
JWT Encoder
Create and sign JSON Web Tokens.
JWT Inspector
Inspect JWT claims, expiry and structure.
Regex Tester
Test regular expressions.
Diff Checker
Compare text differences.
SQL Formatter
Format SQL queries.
SQL Validator
Validate SQL syntax and find errors.
URL Parser
Parse URL components.
HTTP Status Codes
HTTP status code reference.
Cron Expression Parser
Parse cron schedule expressions.
Cron Expression Generator
Build cron schedule expressions visually.
Regex Cheat Sheet
Quick reference for regex syntax and patterns.
Regex Generator
Generate regex patterns from descriptions.
String Escaper
Escape and unescape strings.
Text Case
Convert text to UPPER, lower or CamelCase.
Word Counter
Count words, characters and lines.
Dedupe Lines
Remove duplicate lines.
Character Counter
Count characters, letters, digits and spaces.
Line Counter
Count total, empty and non-empty lines.
Remove Empty Lines
Remove blank and whitespace-only lines.
Sort Lines
Sort text lines alphabetically.
Shuffle Lines
Randomly shuffle text lines.
Reverse Text
Reverse characters, words or line order.
Markdown Previewer
Preview Markdown in real time.
IP Address Lookup
Lookup IP geolocation and ISP.
My IP Address
Show your public IP address.
DNS Lookup
Query DNS records.
DNS Log Monitor
Real-time DNS query logging.
User Agent Parser
Parse browser user agent strings.
Query String Parser
Parse and decode URL query parameters.
HTTP Header Viewer
View and analyze HTTP headers.
WHOIS Lookup
Lookup domain registration info.
Ping Tool
Test network latency and packet loss.
Port Checker
Check if TCP ports are open.
Image to Base64
Convert images to Base64 data URIs.
Base64 Image Viewer
Decode and view Base64-encoded images.
SVG Viewer
View and preview SVG code in real time.
SVG Optimizer
Optimize and clean up SVG markup.
SVG Minifier
Minify and compress SVG code.
Image Compressor
Compress JPEG, PNG and WebP images.
Image Crop
Crop and trim images in the browser.
Image Resize
Resize images to exact dimensions.
Favicon Generator
Generate favicon.ico from any image.
Image Format Converter
Convert images between PNG, JPEG, WebP, SVG.
EXIF Viewer
View EXIF metadata from JPEG photos.
SSL Certificate Checker
Check SSL certificate details.
Password Strength Meter
Evaluate password strength.
CRC32 Hash
Generate CRC32 checksums from text.
Bcrypt Hash Generator
Hash passwords with the bcrypt algorithm.
AES Encrypt / Decrypt
Encrypt and decrypt text with AES.
RSA Key Generator
Generate RSA public/private key pairs.
HMAC Generator
Generate HMAC with SHA-256 and SHA-512.
SQL Minifier
Minify and compress SQL queries.
CSS Formatter
Format and beautify CSS.
CSS Minifier
Minify and compress CSS code.
HTML Formatter
Format and beautify HTML.
HTML Minifier
Minify and compress HTML code.
JavaScript Formatter
Format and beautify JavaScript.
PX to REM Converter
Convert PX to REM and EM units.
Robots.txt Validator
Validate and test robots.txt rules.
Sitemap Validator
Validate XML sitemap structure.
JSON Formatter
Format, validate and pretty-print JSON.
JSON Validator
Validate JSON and catch syntax errors.
JSON Compare
Compare and diff two JSON documents.
JSON Minify
Minify JSON into compact one-line output.
JSON to YAML
Convert JSON into YAML.
JSON to CSV
Convert JSON arrays into CSV.
CSV to JSON
Convert CSV data into JSON.
JSON Schema Validator
Validate JSON against a JSON Schema.
Base64
Encode and decode Base64 text.
Base64URL
URL-safe Base64 encode and decode.
URL Encode
Percent-encode and decode URLs.
HTML Encode
Encode and decode HTML entities.
Unicode Escape
Escape and unescape Unicode sequences.
Hex
Convert text to and from hexadecimal.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512.
HMAC Generator
Generate HMAC with SHA-256 and SHA-512.
UUID Generator
Generate UUID identifiers.
Base32
Encode and decode Base32 strings.
JWT Decoder
Decode JWT headers and payloads locally.
HTTP Status Checker
Check the status of a public URL from the browser.
Regex Tester
Test regular expressions against sample text.
Color Picker
Pick and convert colors (HEX/RGB/HSL).
Color Converter
Convert between color formats.
CSS Formatter
Format and beautify CSS.
CSS Gradient
Create gradient CSS backgrounds.
CSS Flexbox
Visual CSS flexbox layout generator.
Epoch Converter
Convert Unix epoch to human-readable dates.
Timestamp Converter
Convert between Unix time and dates.
Date Formatter
Format dates into readable strings.
Date Diff
Calculate the difference between two dates.
Timezone Converter
Convert times across timezones.
Cron Generator
Build cron schedule expressions visually.
Password Generator
Create secure random passwords.
Base64
Encode and decode Base64 text.
URL Encode / Decode
Percent-encode and decode URLs.
HTML Entity
Encode and decode HTML Entity text.
Unicode
Encode and decode Unicode text.
Hex
Encode and decode Hex text.
Binary
Encode and decode Binary text.
Base32
Encode and decode Base32 text.
Base58
Encode and decode Base58 text.
JWT Decoder
Decode JWT tokens and inspect claims locally.
Morse Code
Encode and decode Morse Code text.
Punycode
Encode and decode Punycode text.
Charset Convert
Convert between GBK, Big5, UTF-8 and more.
UTF-8
Encode and decode UTF-8 text.
Octal
Encode and decode Octal text.
Quoted-Printable
Encode and decode Quoted-Printable text.
Base85
Encode and decode Base85 text.
Braille
Encode and decode Braille text.
Tap Code
Encode and decode Tap Code text.
AAEncode
Encode and decode AAEncode text.
AES Encrypt / Decrypt
Encrypt and decrypt with AES.
DES Encrypt / Decrypt
Encrypt and decrypt with DES.
3DES Encrypt / Decrypt
Encrypt and decrypt with 3DES.
RSA Encrypt / Decrypt
Encrypt and decrypt with RSA.
RC4 Encrypt / Decrypt
Encrypt and decrypt with RC4.
SM4 Encrypt / Decrypt
Encrypt and decrypt with SM4.
SM2 Encrypt / Decrypt
Encrypt and decrypt with SM2.
ChaCha20 Encrypt / Decrypt
Encrypt and decrypt with ChaCha20.
Blowfish Encrypt / Decrypt
Encrypt and decrypt with Blowfish.
RSA Key Pair Generator
Generate RSA public/private key pairs.
Rabbit Encrypt / Decrypt
Encrypt and decrypt with Rabbit.
PGP Encrypt / Decrypt
Encrypt and decrypt with PGP.
AES Key Generator
Generate random AES encryption keys.
MD5 Hash
Compute MD5 message digests.
SHA-1 Hash
Compute SHA-1 message digests.
SHA-256 Hash
Compute SHA-256 message digests.
SHA-512 Hash
Compute SHA-512 message digests.
SHA-3 Hash
Compute SHA-3 message digests.
SM3 Hash
Compute SM3 message digests.
RIPEMD-160 Hash
Compute RIPEMD-160 message digests.
HMAC Generator
Generate HMAC authentication codes.
CRC Checksum
Compute CRC-8/16/32 checksums.
Bcrypt Hash
Hash and verify passwords with Bcrypt.
Scrypt Hash
Derive keys and hash with Scrypt.
Argon2 Hash
Hash passwords with Argon2id.
Hash Compare
Compare text against known hashes.
All-Hash Generator
Generate MD5, SHA-1, SHA-256 and SHA-512 at once.
Case Converter
Convert text between UPPER, lower and CamelCase.
Word Counter
Count words, characters, lines and bytes.
Text Diff
Diff two blocks of text.
Remove Duplicate Lines
Remove duplicate lines from text.
Remove Empty Lines
Strip blank lines.
Trim Whitespace
Trim leading and trailing whitespace per line.
Sort Lines
Sort text lines.
Text Replace
Find and replace text.
Reverse Text
Reverse characters or lines.
Pad Text
Pad lines to a fixed width.
Wrap Text
Wrap text at a line width.
Add Line Numbers / Prefix / Suffix
Add line numbers, prefixes or suffixes.
Text Extract
Extract lines by pattern.
Split & Join
Split and join text blocks.
Chinese Text Tools
Chinese punctuation and full/half-width tools.
Lorem Ipsum Generator
Generate placeholder text.
Markdown Preview
Preview Markdown in real time.
Slug Generator
Turn text into URL-friendly slugs.
Escape Characters
Escape and unescape special characters.
Regex Tester
Test regular expressions.
Regex Cheat Sheet
Regex syntax cheat sheet.
Regex Generator
Generate regex from descriptions.
JSON Formatter
Format, validate and minify JSON.
JSON to YAML
Convert JSON to YAML.
YAML to JSON
Convert YAML to JSON.
JSON to XML
Convert JSON to XML.
XML to JSON
Convert XML to JSON.
XML Formatter
Format and pretty-print XML.
JSON to CSV
Convert JSON arrays to CSV.
CSV to JSON
Convert CSV to JSON.
JSON to TOML
Convert JSON to TOML.
TOML to JSON
Convert TOML to JSON.
JSONPath Query
Query JSON with JSONPath.
JSON Compare
Compare two JSON documents.
JSON Schema Validator
Validate JSON against a schema.
Protobuf Decoder
Decode Protobuf messages.
IP Lookup
Look up IP geolocation and ISP.
IP Subnet Calculator
Calculate subnet, mask and ranges.
IP Format Converter
Convert between IP formats.
URL Parser
Parse URL components.
DNS Lookup
Query DNS records.
DNS Propagation Checker
Check DNS changes across regions.
cURL Generator
Build cURL commands visually.
User Agent Parser
Parse browser user-agent strings.
Port Reference
Reference of common service ports.
CIDR Calculator
Compute CIDR blocks and ranges.
MAC Address Lookup
Look up MAC vendor info.
HTTP Headers Viewer
Inspect HTTP request headers.
WebSocket Tester
Test WebSocket connections.
WHOIS Lookup
Look up domain WHOIS info.
SEO Analysis
Run a basic SEO audit.
Multi-location Ping
Ping a host from multiple locations.
Password Generator
Create secure random passwords.
Password Strength Checker
Check password strength.
Password Breach Checker
Check passwords against known breaches.
XSS Payload Generator
XSS payload reference and encoder.
SQL Injection Reference
SQL injection reference.
CSP Generator
Generate Content-Security-Policy headers.
Security Headers Checker
Analyze a site's security headers.
Certificate Parser
Parse X.509 certificates.
CSRF Token Generator
Generate CSRF tokens.
TOTP / HOTP Generator
Generate TOTP / HOTP codes.
Steganography Detector
Basic image steganography analysis.
Reverse Shell Generator
Generate reverse-shell commands.
LFI Payload Reference
LFI payload reference.
TTY Shell Upgrade
Upgrade to a full TTY shell.
MSFvenom Payload Generator
Generate msfvenom payloads.
Nmap Command Generator
Build nmap scan commands.
SQLMap Command Generator
Build sqlmap commands.
Google Hacking Generator
Build Google Hacking queries.
Linux Privilege Escalation
Linux privilege-escalation reference.
PowerShell Commands
Pen-test PowerShell commands.
File Transfer Reference
File-transfer and exfil reference.
Windows Commands
Windows admin commands.
Linux Commands
Linux admin commands.
Firewalld Generator
Generate firewalld commands.
Iptables Generator
Generate iptables rules.
Wireshark Filter Generator
Build Wireshark filters.
Tcpdump Generator
Build tcpdump capture commands.
JWT Signer / Verifier
Create, sign and verify JWTs.
Security Ports Reference
Common security ports reference.
Timestamp Converter
Convert between Unix time and dates.
Radix Converter
Convert numbers between bases.
Color Converter
Convert between color formats.
Unit Converter
Convert units of measurement.
Number Base Converter
Convert between arbitrary bases.
ASCII Table
Browse the ASCII character table.
Unicode Table
Browse Unicode characters.
HTML Color Table
Pick named HTML colors.
WCAG Contrast Checker
Check WCAG color contrast ratios.
BIP39 Mnemonic
Generate and validate BIP39 mnemonics.
Blockchain Address Validator
Validate blockchain addresses.
QR Code Generator
Generate QR codes.
QR Code Decoder
Decode QR codes from images.
Barcode Generator
Generate barcodes.
Cron Expression Generator
Build and parse cron expressions.
Image Compressor
Compress images online.
Image Resizer
Resize images to any size.
Image Cropper
Crop images in the browser.
Image Format Converter
Convert between image formats.
Image Watermark
Add watermarks to images.
Image to Base64
Convert images to and from Base64.
Image EXIF Viewer
View image EXIF metadata.
Image Split / Merge
Split or merge images.
SVG Optimizer
Optimize SVG markup.
ICO Converter
Convert images to ICO.
Favicon Generator
Generate a favicon from an image.
CSS Gradient Generator
Build CSS gradient backgrounds.
CSS Shadow Generator
Design CSS shadows visually.
CSS Flexbox Playground
Experiment with CSS flexbox.
CSS Grid Playground
Experiment with CSS grid.
CSS Animation Generator
Create CSS keyframe animations.
CSS Minifier
Minify and format CSS.
JS Minifier
Minify JavaScript code.
JS Formatter
Format JavaScript.
JS Beautifier
Beautify obfuscated JavaScript.
JS Runner
Run JS in a sandbox.
JS Obfuscator
Obfuscate JavaScript.
JS Deobfuscator
Deobfuscate JavaScript.
Babel Transformer
Transpile JS with Babel.
TypeScript Playground
Run TypeScript in the browser.
UUID Generator
Generate UUID v1/v4/v5 identifiers.
ULID Generator
Generate ULID identifiers.
NanoID Generator
Generate compact NanoID strings.
Random String Generator
Generate random strings.
Random Number Generator
Generate random numbers.
Batch Hash Generator
Generate hashes in bulk.
Chinese Lorem Ipsum
Generate Chinese placeholder text.
Mock Data Generator
Generate mock data.
Base Calculator
Calculator with base conversion.
Bitwise Calculator
Bitwise AND/OR/XOR/NOT and shifts.
Math Expression Evaluator
Evaluate math expressions.
Percentage Calculator
Calculate percentages.
BMI Calculator
Calculate body mass index.
HTML to Markdown
Convert HTML to Markdown.
Markdown to HTML
Convert Markdown to HTML.
CSV to SQL
Turn CSV into SQL INSERTs.
SQL to CSV
Turn SQL into CSV.
JSON to TypeScript
Generate TypeScript interfaces from JSON.
JSON to Go Struct
Generate Go structs from JSON.
JSON to Java
Generate Java classes from JSON.
JSON to MySQL
Generate MySQL tables from JSON.
Excel to JSON
Convert Excel to JSON.
PDF Text Extractor
Extract text from PDFs.
HTML Formatter
Format and minify HTML.
SQL Formatter
Format and minify SQL.
Timezone Converter
Convert times across timezones.
Date Diff
Compute the difference between dates.
Frequency Analysis
Character and n-gram frequency analysis.
Entropy Calculator
Shannon entropy calculator.
Encoding Detector
Auto-detect text encoding.
Charset Detector
Detect text character set.
Binary Analysis
Hex viewer and binary analysis.
Social Password Generator
Generate social-engineering password candidates.
Emergency Response Toolkit
Cybersecurity incident response toolkit.
401(k) Calculator
Estimate 401(k) contributions, growth and retirement balance.
50/30/20 Budget Calculator
Split income into needs, wants and savings with the 50/30/20 rule.
APY Calculator
Convert APR to APY and compare savings yields.
Auto Loan Calculator
Estimate car loan payments, interest and total cost.
Budget Calculator
Plan monthly income and expenses with a simple budget.
CAGR Calculator
Measure the compound annual growth rate of an investment.
Capital Gains Tax Calculator
Estimate tax on long- and short-term capital gains.
Car Affordability Calculator
Find the car payment and price you can afford.
CD Calculator
Project returns from a certificate of deposit.
Compound Interest Calculator
See how compounding grows savings over time.
Credit Card Payoff Calculator
Plan payments to clear credit card debt faster.
Debt Avalanche Calculator
Pay debts fastest by targeting highest rates first.
Debt Consolidation Calculator
Compare consolidation versus current debt payments.
Debt Payoff Calculator
Find how long it takes to become debt-free.
Debt Snowball Calculator
Pay off debts smallest-balance first for momentum.
Debt-to-Income Ratio Calculator
Check your DTI for loan eligibility.
Dividend Calculator
Project dividend income and reinvestment growth.
Down Payment Calculator
Plan a home down payment and savings goal.
Emergency Fund Calculator
Size an emergency cash cushion for your expenses.
Extra Payment Mortgage Calculator
See savings from extra mortgage payments.
Federal Income Tax Calculator
Estimate U.S. federal income tax owed.
Health Insurance Calculator
Compare premiums, deductibles and out-of-pocket costs.
Home Affordability Calculator
Estimate the home price you can afford.
Income Tax Calculator
Estimate income tax across filing statuses.
Inflation Calculator
See how inflation erodes purchasing power.
Investment Growth Calculator
Project portfolio growth with contributions.
IRA Contribution Calculator
Maximize IRA contributions and limits.
Life Insurance Calculator
Estimate the life cover you need.
Loan Calculator
Estimate any loan payment, term and interest.
Mortgage Amortization Calculator
View a mortgage amortization schedule by month.
Mortgage Calculator
Estimate monthly mortgage payment and total cost.
Net Worth Calculator
Track assets minus liabilities over time.
Paycheck Calculator
Estimate take-home pay from gross wages.
PMI Calculator
Estimate private mortgage insurance costs.
Refinance Calculator
Check if refinancing a mortgage saves money.
Rent vs Buy Calculator
Compare renting versus buying a home.
Rental Property Calculator
Analyze rental property cash flow and ROI.
Retirement Calculator
Plan the savings needed for retirement.
RMD Calculator
Estimate required minimum distributions.
ROI Calculator
Calculate return on investment percentage.
Roth IRA Calculator
Compare Roth IRA growth and taxes.
Rule of 72 Calculator
Estimate doubling time at a given rate.
Salary Calculator
Convert salary to hourly or annual pay.
Sales Tax Calculator
Add or reverse sales tax on a price.
Savings Goal Calculator
Plan monthly savings to hit a goal.
Self-Employment Tax Calculator
Estimate self-employment tax on 1099 income.
Social Security Breakeven Calculator
Find the best age to claim Social Security.
Social Security Estimator
Estimate future Social Security benefits.
Student Loan Calculator
Estimate student loan payments and payoff.
BAC Calculator
Estimate blood alcohol concentration.
Blood Pressure Calculator
Understand blood pressure categories and ranges.
BMI Calculator
Calculate body mass index and healthy range.
BMR Calculator
Estimate basal metabolic rate.
Body Fat Calculator
Estimate body fat percentage.
Calorie Calculator
Estimate daily calorie needs.
Carb Calculator
Estimate daily carbohydrate intake.
Due Date Calculator
Estimate pregnancy due date.
Fat Intake Calculator
Estimate daily fat intake target.
Fiber Intake Calculator
Estimate daily fiber needs.
Heart Rate Zone Calculator
Find target heart rate training zones.
Ideal Weight Calculator
Estimate a healthy ideal weight.
Lean Body Mass Calculator
Estimate lean body mass.
Macro Calculator
Estimate protein, carb and fat macros.
Meal Calorie Calculator
Estimate calories in a meal.
Ovulation Calculator
Estimate ovulation and fertile window.
Pregnancy Weight Gain Calculator
Track healthy pregnancy weight gain.
Protein Calculator
Estimate daily protein needs.
Sleep Calculator
Find optimal bedtime and wake time.
TDEE Calculator
Estimate total daily energy expenditure.
Water Intake Calculator
Estimate daily water intake.
Color Test
Test color vision and perception.
IQ Puzzle
Challenge logic with brain-teasing puzzles.
Memory Test
Measure short-term memory performance.
Minesweeper
Play the classic minesweeper puzzle game.
Number Memory
Train recall of number sequences.
Reaction Test
Measure your reaction time.
Sudoku
Play classic sudoku number puzzles.
Typing Test
Test and improve typing speed.
Visual Memory
Train visual memory and recall.