All tools
Browse every tool below, or open the catalog by topic. Search with ⌘K anytime.
Text & Writing
Count, convert, clean, and compare text.
Word Counter
Count words, characters, sentences, paragraphs, and reading time.
Case Converter
Convert text to upper, lower, title, sentence, camel, snake, and kebab case.
Find and Replace
Find and replace text with optional regex and case sensitivity.
Remove Extra Spaces
Trim and collapse extra spaces, tabs, and blank lines.
Remove Line Breaks
Join lines into a single paragraph or normalize line endings.
Slug Generator
Turn any title into a clean URL slug.
Lorem Ipsum Generator
Generate placeholder paragraphs, sentences, or words.
Reading Time Calculator
Estimate reading time from any passage of text.
Sort Lines
Sort lines alphabetically, by length, or reverse order.
Text Diff
Compare two texts and highlight line-by-line differences.
Remove Duplicate Lines
Keep unique lines and drop duplicates.
Reverse Text
Reverse characters or lines in any text.
Add Line Numbers
Prefix each line with a sequential number.
Extract Emails
Pull email addresses out of pasted text.
Extract URLs
Pull http/https links out of pasted text.
Word Frequency
Count how often each word appears.
Text to Binary
Convert text into binary 0s and 1s.
Binary to Text
Decode binary back into readable text.
Invisible Character Remover
Strip zero-width and invisible Unicode characters.
Text Repeater
Repeat a string N times.
Whitespace Visualizer
Show spaces and tabs as visible symbols.
PDF & Documents
Merge, split, and convert PDFs.
Merge PDF
Combine multiple PDF files into one document.
Split PDF
Extract a page range from a PDF into a new file.
Images to PDF
Convert one or more images into a single PDF.
PDF Metadata Viewer
Inspect page count, title, author, and other PDF metadata.
Compress PDF
Reduce PDF file size while keeping pages readable.
PDF to JPG
Convert each PDF page into a JPG image.
PDF to PNG
Export PDF pages as PNG images.
Rotate PDF
Rotate PDF pages 90°, 180°, or 270°.
Organize PDF
Reorder PDF pages before downloading.
PDF Page Numbers
Stamp page numbers onto a PDF.
Watermark PDF
Add a text watermark across PDF pages.
Protect PDF
Add a password to encrypt a PDF.
Unlock PDF
Remove a PDF password you own.
PDF to Text
Extract selectable text from a PDF.
Search PDF Text
Find pages containing a search string in extracted PDF text.
Image Tools
Compress, resize, convert, and edit images.
Image Compressor
Compress JPG, PNG, and WebP images.
Image Resizer
Resize images to exact dimensions while keeping quality options.
Image Format Converter
Convert between PNG, JPEG, and WebP locally.
Rotate & Flip Image
Rotate 90° steps or flip images horizontally and vertically.
Crop Image
Crop photos to exact pixel regions.
Image to Base64
Encode an image file as a Base64 data URL.
Base64 to Image
Decode a Base64 string into a downloadable image.
WebP to PNG
Convert WebP images to PNG.
PNG to JPG
Convert PNG images to JPG.
JPG to PNG
Convert JPG images to PNG.
Strip EXIF
Remove EXIF metadata from photos.
Image Watermark
Stamp text onto an image before download.
Blur Image
Apply a blur filter to an image.
Favicon Generator
Create a favicon PNG from any square image.
Social Image Resizer
Resize images to common social media sizes.
Average Image Color
Find the average color of an uploaded image.
Pixelate Image
Pixelate an image for privacy or style.
Aspect Ratio Calculator
Compute missing width or height for a ratio.
DPI / Print Size
Estimate print size from pixels and DPI.
Developer Tools
Formatters, encoders, parsers, and coding utilities.
JSON Formatter
Format, validate, and minify JSON.
Base64 Encoder / Decoder
Encode or decode Base64 strings instantly.
URL Encoder / Decoder
Percent-encode or decode URL components safely.
JWT Decoder
Decode JWT header and payload without verifying signatures.
UUID Generator
Generate UUID v4 values in batches.
Regex Tester
Test regular expressions with live match highlighting.
Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates.
Cron Expression Parser
Explain cron expressions in plain English.
Markdown to HTML
Convert Markdown to HTML with a live preview.
HTML / CSS / JS Minifier
Minify HTML, CSS, or JavaScript by stripping comments and whitespace.
YAML Formatter
Validate and pretty-print YAML documents.
XML Formatter
Pretty-print and validate XML.
SQL Formatter
Beautify SQL queries for readability.
CSS Beautifier
Format messy CSS with indentation.
JavaScript Beautifier
Format minified or messy JavaScript.
JSON to CSV
Convert a JSON array of objects into CSV.
JSON Diff
Compare two JSON documents side by side.
Number Base Converter
Convert between binary, octal, decimal, and hex.
JWT Encoder
Build an unsigned or HS256 JWT from header and payload.
NanoID Generator
Generate URL-safe NanoID strings.
ASCII Converter
Convert text to ASCII codes and back.
HTML Entity Encoder
Encode and decode HTML entities.
CSS Unit Converter
Convert px, rem, and em at a chosen root size.
Regex Cheatsheet
Quick reference for common regex tokens.
UUID Validator
Check if a string is a valid UUID.
Markdown Table Generator
Build a Markdown table from CSV-like input.
Base64URL Encoder
Encode and decode Base64URL (JWT-safe) strings.
Query String Builder
Build a URL query string from key/value pairs.
Binary Fraction Helper
Convert simple decimals toward binary fractions.
Chmod Calculator
Convert Unix permission flags to octal chmod.
Cron Next Runs
Explain a 5-field cron and show example cadence.
JSON Minify
Minify JSON into a single compact line.
CSS Minify
Minify CSS by stripping comments and extra spaces.
JS Minify Lite
Lightweight JS whitespace minify for snippets.
Calculators
Percentage, EMI, BMI, tip, and everyday math.
Percentage Calculator
Calculate percentages, increases, decreases, and reverse percentages.
Age Calculator
Calculate exact age in years, months, and days from a birth date.
BMI Calculator
Calculate body mass index from height and weight.
Tip Calculator
Split a bill and calculate tip per person.
Discount Calculator
Find sale price and savings from an original price and discount.
Loan EMI Calculator
Calculate EMI, total interest, and payment schedule inputs for loans.
Simple Interest Calculator
Compute simple interest and maturity amount.
Mortgage Calculator
Estimate monthly mortgage payments.
SIP Calculator
Project SIP mutual fund growth over time.
VAT Calculator
Add or remove VAT from a price.
Hourly to Salary
Convert hourly wages to annual salary.
Calorie Calculator
Estimate daily calorie needs (TDEE).
Percentage Change
Calculate percent increase or decrease between two values.
Stacked Discount Calculator
Apply sequential discounts to a price.
Exact Age Calculator
Show age in years, months, and days.
Due Date Calculator
Estimate due date from last menstrual period.
Ovulation Calculator
Estimate ovulation window from cycle length.
Unit & Data Converters
Convert length, weight, temperature, area, and data sizes.
Length Converter
Convert between meters, feet, inches, km, miles, and more.
Weight Converter
Convert kilograms, pounds, ounces, grams, and stones.
Temperature Converter
Convert Celsius, Fahrenheit, and Kelvin.
Area Converter
Convert square meters, acres, hectares, sq ft, and more.
Data Size Converter
Convert bytes, KB, MB, GB, and TB (binary or decimal).
Speed Converter
Convert between km/h, mph, m/s, and knots.
Volume Converter
Convert liters, gallons, cups, and milliliters.
Time Unit Converter
Convert seconds, minutes, hours, and days.
Pressure Converter
Convert PSI, bar, atm, and kPa.
Fuel Economy Converter
Convert MPG and L/100km.
Angle Converter
Convert degrees and radians.
Power Converter
Convert watts, kilowatts, and horsepower.
Energy Converter
Convert joules, calories, and kWh.
Number to Words
Spell out numbers in English words.
Words to Number
Parse simple English number words to digits.
Generators
QR codes, passwords, UUIDs, and random helpers.
QR Code Generator
Create downloadable QR codes from text or URLs.
Password Generator
Generate strong random passwords with customizable options.
Random Number Generator
Generate random integers within a range.
Color Palette Generator
Generate harmonious color palettes from a base hue.
Barcode Generator
Create a Code 128 barcode as SVG.
Wi‑Fi QR Code
Generate a QR code that joins a Wi‑Fi network.
Fake Name Generator
Generate random placeholder people names.
Random Bytes Generator
Generate random hex or base64 byte strings.
Cron Generator
Build a cron expression from simple choices.
Passphrase Generator
Generate memorable multi-word passphrases.
Batch Password Generator
Generate multiple passwords at once.
SEO Tools
Meta tags, robots.txt, Open Graph, and keyword helpers.
Meta Tag Preview
Preview title and description lengths for search snippets.
Robots.txt Generator
Build a robots.txt file with allow/disallow rules.
Open Graph Preview
Draft Open Graph tags and preview social share cards.
Keyword Density Checker
Analyze word frequency and density in a block of text.
Sitemap URL List Helper
Turn a list of URLs into a basic XML sitemap snippet.
SERP Preview
Preview how a title and description may look in search.
Open Graph Tag Generator
Generate Open Graph meta tags for a page.
JSON-LD Generator
Build basic Article or Organization JSON-LD.
Canonical Tag Builder
Create a canonical link tag for a URL.
Hreflang Builder
Generate hreflang link tags for locales.
Bulk UTM Builder
Build multiple UTM links from a URL list.
Meta Length Checker
Check title and meta description lengths.
Robots.txt Path Tester
Test whether a path matches Disallow rules.
Website & Network
HTTP status codes, MIME types, and user-agent parsing.
HTTP Status Code Lookup
Look up HTTP status codes with plain-English meanings.
MIME Type Lookup
Find MIME types by extension or content type.
User-Agent Parser
Parse a user-agent string into browser, OS, and device hints.
IP Address Validator
Check if a string is a valid IPv4 or IPv6 address.
URL Parser
Split a URL into protocol, host, path, and query.
HTTP Header Builder
Compose common HTTP request headers.
DNS Record Types
Lookup explanations for common DNS record types.
HTTP Methods Cheatsheet
Quick reference for GET, POST, PUT, PATCH, DELETE.
MIME by Extension
Look up MIME type from a file extension.
Security & Privacy
Hashes, HMAC, and password strength checks.
Password Strength Checker
Estimate password strength from length and character variety.
Hash Generator
Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes locally.
HMAC Generator
Create HMAC-SHA signatures with a secret key.
TOTP Code Display
Generate a 6-digit TOTP from a base32 secret.
MD5 Hash Generator
Generate an MD5 digest from text (non-security uses).
Password Entropy
Estimate password entropy bits from charset size.
JWT Claims Inspector
Highlight exp, iat, and sub claims in a JWT.
HMAC Compare
Compare two HMAC hex digests safely.
Color & Design
Convert colors, check contrast, and build palettes.
Color Converter
Convert between HEX, RGB, and HSL with a live swatch.
Contrast Checker
Check WCAG contrast between foreground and background colors.
CSS Gradient Generator
Build linear CSS gradients and copy the code.
Color Blind Simulator
Preview how a color may look with common deficiencies.
Tint & Shade Generator
Generate lighter tints and darker shades of a color.
Random Hex Color
Generate random HEX colors.
Gradient Text CSS
Generate CSS for gradient-filled text.
Box Shadow Generator
Build a CSS box-shadow declaration.
Border Radius Preview
Preview CSS border-radius values.
File & Data
CSV, JSON, file hashing, and tabular previews.
CSV ↔ JSON
Convert CSV tables to JSON arrays and back.
CSV Viewer
Preview CSV data as a table.
File Hash Calculator
Compute SHA-256 of a local file without uploading it.
JSON to YAML
Convert JSON into YAML text.
YAML to JSON
Convert simple YAML maps into JSON.
TSV to CSV
Convert tab-separated values to CSV.
CSV Delimiter Detector
Guess whether a file uses commas, tabs, or semicolons.
Filename Slugifier
Turn messy filenames into safe slugs.
Business & Office
Invoice helpers, totals, and office utilities.
Invoice Totals Calculator
Add line items, tax, and discounts for a quick invoice total.
Acronym / Initials Generator
Create acronyms and initials from a phrase or name list.
Margin vs Markup
Convert between margin and markup percentages.
PAN Format Checker
Validate Indian PAN number format.
Unit Price Calculator
Compare price per unit across packages.
Acronym Expander Notes
Store a quick acronym → meaning mapping list.
Invoice Due Date
Add Net-15/30/60 days to an invoice date.
Finance & Money
GST, EMI, compound interest, and margin calculators.
GST Calculator (India)
Add or remove GST (5%, 12%, 18%, 28%) from an amount.
Compound Interest Calculator
Project compound growth with annual or monthly compounding.
Profit Margin Calculator
Calculate profit, margin %, and markup from cost and selling price.
ROI Calculator
Calculate return on investment percentage.
Break-Even Calculator
Find units needed to break even.
CAGR Calculator
Compute compound annual growth rate.
FD Calculator
Estimate fixed deposit maturity amount.
IFSC Format Checker
Validate Indian IFSC code format.
Luhn Checksum
Validate a number with the Luhn algorithm (format only).
Lease vs Buy
Compare rough lease and buy monthly costs.
Sales Tax Calculator
Add sales tax to a pre-tax amount.
Loan Affordability
Estimate loan principal from a target EMI.
Inflation Calculator
Adjust a value for inflation over years.
Education & Study
GPA, grades, and study helpers.
GPA Calculator
Compute weighted GPA from course grades and credits.
Grade Percentage Calculator
Convert marks obtained into a percentage score.
CGPA Calculator
Calculate cumulative GPA from semester scores.
Weighted Grade Calculator
Combine assignment weights into a final grade.
Roman Numerals Converter
Convert numbers to Roman numerals and back.
GPA to Percentage
Convert GPA scales to approximate percentages.
Attendance Calculator
Compute attendance percentage from classes.
Date, Time & Productivity
Date math, world clocks, timers, and timestamps.
Date Difference
Find the number of days between two dates.
World Clock
Compare the current time across common time zones.
Pomodoro Timer
A simple focus timer with work and break intervals.
Timezone Converter
Convert a time between common timezones.
Business Days Calculator
Count weekdays between two dates.
Epoch Milliseconds
Convert epoch milliseconds to dates and back.
Countdown Timer
Set a simple countdown timer.
Stopwatch
Start, pause, and reset a stopwatch.
Days Until
Count days until a future date.
Work Hours Calculator
Sum daily hours into a weekly total.
Timezone Abbreviation Lookup
Look up common timezone abbreviations.
Social Media & Content
Hashtags, character limits, and UTM builders.
Hashtag Extractor
Extract unique hashtags from a caption or post.
Social Character Limits
Check text against common social platform character limits.
UTM Builder
Build campaign URLs with UTM parameters.
Instagram Bio Counter
Count characters for Instagram bios.
YouTube Title Length
Check YouTube title and description lengths.
Tweet Counter
Count characters for X/Twitter posts.
Hashtag Generator
Turn keywords into hashtag suggestions.
Accessibility & Reading
Contrast, spacing, and reading-level estimates.
Food & Everyday Life
Cooking converters, tip, and bill splitters.
Fun & Miscellaneous
Coin flips, dice, pickers, and Morse code.
Coin Flip
Flip a virtual coin for a quick heads or tails.
Dice Roller
Roll one or more dice with custom sides.
Random Picker
Pick a random item from a list of options.
Morse Code Translator
Encode text to Morse code or decode Morse back to text.
List Randomizer
Shuffle a list into random order.
Yes/No Picker
Get a random yes or no answer.
Name Spinner
Spin through names until one is picked.
Palindrome Checker
Check whether text reads the same forwards and backwards.
Anagram Checker
Check if two phrases are anagrams.
Best-of Coin Flip
Flip a coin multiple times and tally results.
Dice Roll Statistics
Roll many dice and see the distribution.
Morse Timing Guide
Show dit/dah timing ratios for Morse practice.
Audio
Tempo, duration, and light audio helpers.
Video Helpers
Aspect ratios and resolution references for video work.