Useful Online ToolsReady Instantly
Text, coding, design, images, and random draws—all in one place at JoeLucky.
Featured Tools
Text
Word counters, case converters and text utilities
Word Counter
Count words, characters and paragraphs in real-time
Case Converter
CamelCase, snake, kebab & title case conversions
Lorem Ipsum
Generate placeholder text for your designs
Whitespace Remover
Remove redundant whitespaces and line breaks
Bionic Reading
Convert text to bionic reading format for faster reading
Text Diff Checker
Compare two texts by line, word, or character, with side-by-side or unified views and options to ignore whitespace/case
OCR Image to Text
Extract text from images in your browser, with English, Chinese, Japanese and German supported and no image upload.
Developer
Base64, JSON, JWT and other developer essentials
Base64 Encoder/Decoder
Fast conversion between string and base64 encodings
JSON Tree Viewer
Inspect nested JSON structures and fix syntax errors
JWT Encoder/Decoder
Decode a JWT to read its header, payload and expiry status. Decoding only: signatures are not verified.
UUID Generator
Generate UUID v4 and v7 in bulk, with formatting options and a built-in validator.
URL Encoder / Decoder
Encode and decode URLs in real time, with full UTF-8 support.
JSON to CSV
Convert a JSON array of objects into a CSV table without dropping any fields.
CSV to JSON
Convert a CSV table into a pretty-printed JSON array.
JSON to YAML
Convert JSON to readable YAML, handy for config files and CI/CD.
YAML to JSON
Convert YAML to pretty-printed JSON, parsed safely.
JSON to XML
Convert JSON to XML with a configurable root element.
CSS & Design
Gradient, shadow, animation and other CSS/visual-design generators
Code to Image
Convert code snippets to aesthetic screenshots
CSS Gradient Generator
Design linear, radial, and conic gradients visually - copy CSS instantly
CSS Glassmorphism
Realtime backdrop blur & translucent border code
Box Shadow Generator
Create smooth layered shadows with interactive previews
CSS Loader Generator
Generate pure CSS loading indicators
SVG Blob Generator
Generate organic SVG blob contours with adjustable complexity
SVG to PNG
Render high-DPI PNG assets from SVG markup
Color Contrast Checker
Check the WCAG contrast ratio between two colors and see AA and AAA pass or fail results.
PX / REM / EM Converter
Convert between px, rem and em with a custom root font size, including a batch list mode.
Image
Image compression, cropping and format conversion
Image Color Extractor
Extract dominant color palettes from uploaded images
Image Editor
Paste a screenshot to crop, resize, rotate, add text and convert formats right away.
Image Compressor
Batch-compress JPEG, PNG and WebP images with adjustable quality and live savings feedback
Image Resizer
Batch-resize images by pixels or percentage, with common presets and aspect-ratio lock
HEIC to JPG
Batch-convert iPhone HEIC/HEIF photos to universally-supported JPG, entirely in your browser
WebP to PNG/JPG
Batch-convert WebP images to PNG (alpha preserved) or JPG, with a custom background for transparent areas
JPG/PNG to WebP
Batch-convert JPEG and PNG images to the smaller WebP format, with full PNG transparency preserved
PNG to JPG
Batch-convert PNG images to smaller JPGs, with a background color of your choice for transparent areas.
JPG to PNG
Batch-convert JPG images to lossless PNG format — handy for editing or upload flows that require a PNG file
Favicon/ICO Generator
Generate favicons, app icons, and web assets from a single image.
Merge, compress, split and convert PDF files
PDF Merger
Merge PDF files client-side without upload
PDF Compressor
Compress PDF files client-side, with a non-destructive "preserve document" mode and a smaller-file "rasterize" mode
PDF Splitter
Split a PDF by page ranges, every N pages, or custom groups — original page content is fully preserved
JPG to PDF
Combine multiple JPG/PNG images into a single PDF, with page size, orientation and margin controls
PDF to JPG
Convert every PDF page to a JPG image, with adjustable quality and scale, and page-range selection
Rotate PDF
Rotate selected PDF pages in your browser. Nothing is uploaded.
Remove PDF Pages
Delete unwanted pages from a PDF in your browser and download the rest. Nothing is uploaded.
Organize PDF
Reorder, rotate or delete PDF pages in your browser. Nothing is uploaded.
Watermark PDF
Add a text watermark to a PDF in your browser, with adjustable size, opacity and position. Nothing is uploaded.
Add Page Numbers to PDF
Add page numbers to a PDF in your browser, with a custom start number, position, prefix and suffix.
Calculator
Percentage, unit conversion and other everyday calculators
Percentage Calculator
Calculate percentages, percentage change and increases or decreases, with the formula and steps shown.
Unit Converter
Convert between units across 12 categories, including length, weight, temperature, area and volume.
Scientific Calculator
An online scientific calculator with trigonometry, logarithms, exponents and factorials.
Fraction Calculator
Add, subtract, multiply, divide and simplify fractions, with mixed-number and decimal output.
Average Calculator
Paste a list of numbers to get the mean, median, sum, count, and min/max
BMI Calculator
A metric and imperial BMI calculator showing the adult BMI category, for reference only.
GPA Calculator
Calculate a weighted GPA from course grades and credits, on a common 4.0 scale by default — results are an estimate
Grade Calculator
Calculate the final exam score needed to reach a target course grade, with a clear explanation when the target is unreachable or already secured
Time & Date
Timestamp, date, age and time-zone conversion tools
Timestamp Converter
Live Unix timestamp with bidirectional conversion, multi-timezone and multi-format output
Date Calculator
Find the difference between two dates, add or subtract time, and count workdays.
Age Calculator
Calculate exact age from a date of birth, with a countdown to the next birthday.
Time Zone Converter
Compare local times across time zones with automatic DST handling, handy for scheduling meetings across regions.
Current Time
Live local time and date with timezone details, ready to copy in one click.
Stopwatch
An online stopwatch with start, pause, resume, reset and lap timing.
Countdown Timer
Count down from a set time with pause, resume and reset, staying accurate even in a background tab.
Days Until
Pick a future date to see how many days and weeks remain.
Utilities
QR codes, password generators and other multi-purpose tools
QR Code Generator
Create vector SVG or PNG QR codes
Bulk QR Code Generator
Paste a list or import a CSV to batch-generate QR codes and download them as a ZIP.
QR Code Scanner / Reader
Decode QR codes from your camera or an image and recognize URLs, Wi-Fi, contacts and more. Runs in your browser and never opens links automatically.
Barcode Generator
Generate Code 128, EAN-13, UPC-A and other barcodes with checksum validation, as SVG or PNG.
Bulk Barcode Generator
Batch-generate barcodes from a pasted list or CSV, then print or save as PDF.
Barcode Scanner
Scan barcodes and QR codes from an image or your camera and check the check digit.
Password Generator
Generate cryptographically sound passwords
Email Signature Generator
Build an HTML email signature compatible with Gmail and Outlook from your name, title and contact details.
Random & Fun
Random wheels, lucky draws and other fun tools
Quick Draw
Fair and fast online lucky draw with multiple prize support, winner directory, and CSV export
Random Wheel
Spin the wheel to randomly select an answer
Event Draw
An event drawing tool for company parties and celebrations, featuring customizable prizes, rehearsal mode, and stage presentation.
Random Number Generator
Set a range and generate random numbers in seconds.
Random Seating Chart Generator
Import a roster and arrange random seats with ease.
Daily Fortune Draw
Draw a daily or free fortune and see how today looks.
Jiaobei Moon Blocks Simulator
Throw jiaobei blocks in 3D and enjoy the traditional custom.
Rebirth Simulator
Get reborn at random somewhere in the world — where is your next stop?
Finance
Loan, mortgage, compound interest, ROI, margin and discount calculators
Loan Calculator
Calculate monthly payment, total payment and total interest from principal, rate and term.
Mortgage Calculator
Calculate the loan amount and monthly principal and interest from price, down payment, rate and term.
Compound Interest Calculator
Enter principal, rate, duration, and compound frequency, with an optional regular contribution, to calculate the ending balance and interest earned
ROI Calculator
Calculate gain or loss and ROI from an initial investment and a final value.
Profit Margin Calculator
Calculate profit, profit margin and markup from cost and selling price.
Discount Calculator
Enter the original price and discount to see the savings and final price instantly.
Invoice Generator
Create invoices from business, client and line-item details, ready to export as PDF or print. Not a government-certified e-invoice.
Currency Converter
Convert between world currencies, several at once. Rates update daily and are for reference only.
Payment Processing Fee Calculator
Quickly calculate Stripe and PayPal fees, net received, and the amount to charge for a target net.
Network & IP
IP lookup, network information and connection-safety tools
What Is My IP
Shows your public IP, network details and approximate location, with a WebRTC leak check.
IP Lookup
Look up RDAP registry data and reverse DNS for an IPv4/IPv6 address, domain or URL.
IP Reputation & Risk Checker
Assess an IP across reputation, anonymity and abuse-risk dimensions. Most signals show "insufficient data" in this version.
CIDR Subnet Calculator
Enter a CIDR to get network, broadcast, usable hosts and masks for IPv4 and IPv6.
SPF & DMARC Generator
Generate and check SPF and DMARC records in your browser, without querying DNS.
SEO & Marketing
UTM builder, meta tags, structured data and other SEO/marketing tools
UTM Builder
Build campaign tracking links with UTM parameters, keeping any existing query parameters.
Meta Tag + Open Graph Generator
Generate SEO, Open Graph and Twitter/X card meta tags, with previews and one-click copy.
Schema Markup / JSON-LD Generator
Build Schema.org JSON-LD structured data from a form, with a live preview.
ROAS Calculator
Enter ad spend and revenue to get ROAS and ACoS, and find your break-even ROAS.