Free Online Toolbox
100 handy tools for images, time, life, office work and development. Everything runs locally in your browser — your data is never uploaded, fast and secure.
All Tools
Image
Image Compressor
Compress JPG, PNG and WebP images online by up to 90% with almost no visible quality loss.
Compress Image to Size
Compress any image to exactly 100KB, 200KB or a custom size — ideal for exam forms and ID uploads.
Image Resizer
Resize images by pixels or percentage, with aspect-ratio lock and size presets.
Image Cropper
Crop images online with free or fixed aspect ratios (1:1, 4:3, 16:9 and more).
Image Stitcher
Combine multiple images into one long vertical or horizontal image with adjustable gaps and background.
Watermark Image
Add text or logo watermarks with 9-grid positioning, tiled pattern and opacity control to protect your copyright.
Image Mosaic
Pixelate private areas such as ID cards, receipts and chat screenshots. Undo supported, fully local.
Image to PDF
Merge multiple images into one PDF with custom page order, paper size, orientation and margins.
Image Color Picker
Click any pixel to get its exact HEX, RGB and HSL values, or extract the image's dominant palette.
Rotate & Flip Image
Rotate images 90/180/270 degrees or flip them horizontally and vertically with live preview.
Round Avatar Cropper
Crop any photo into a circular or rounded avatar with zoom, drag and transparent PNG output.
Image Splitter
Split an image into a grid of tiles by rows and columns and download each piece — great for social grids.
Image Filters
Adjust brightness, contrast, saturation, grayscale, sepia and blur with live preview, then export.
Image Upscaler
Enlarge images 2x, 4x or to a custom size with high-quality interpolation and optional sharpening.
Text to Image
Turn text into a beautiful image card with custom fonts, colors and backgrounds — export PNG to share.
Image Editor Studio
Crop, rotate, flip, resize, colour-grade, round corners, watermark and compress images on a single page.
ID Photo Background Remover
Remove a solid-colour background by colour similarity, switch to white, blue or red, and export standard ID photo sizes.
Batch Image Processor
Process many images at once — resize, compress, convert and watermark — then download everything as a ZIP.
EXIF Viewer & Cleaner
Inspect camera model, capture time, exposure settings and GPS location, then strip metadata before sharing.
Time
Online Clock
A live clock showing current time and date, with fullscreen mode for desk use.
Online Stopwatch
Precise stopwatch with 0.01s display — start, pause, reset and lap timing.
Countdown Timer
Set hours, minutes and seconds, with a beep alert when time is up.
Pomodoro Timer
Classic 25/5 focus timer with customizable durations to boost productivity.
Life
Age Calculator
Find your exact age in years, months and days, plus a countdown to your next birthday.
Tip Calculator
Split the bill and calculate tips, totals and per-person amounts in seconds.
Loan Calculator
Compare equal-payment and equal-principal loans — monthly payment and total interest instantly.
Compound Interest Calculator
See how your money grows with compound interest — principal, rate and years is all you need.
Income Tax Calculator
Estimate monthly income tax and take-home pay with custom social insurance deductions.
Discount Calculator
Convert discount rates to final prices and savings, including spend-and-save deals.
Due Date Calculator
Enter the first day of your last period to estimate your due date and current pregnancy week.
Ovulation Calculator
Predict your next period, ovulation day and fertile window from your cycle length.
Water Intake Calculator
Find your recommended daily water intake based on body weight, in cups and bottles.
BMR Calculator
Calculate your Basal Metabolic Rate and daily calorie needs with the Mifflin-St Jeor formula.
Heart Rate Zones
Get your maximum heart rate and the five training zones for fat burn, cardio and more.
Exercise Calories
Estimate calories burned for walking, running, swimming and more using MET values.
Ideal Weight Calculator
See your healthy weight range from height and gender with popular formulas.
Pet Age Calculator
Convert dog and cat years to human years and find out how old your pet really is.
Fuel Cost Calculator
Enter distance, fuel used and price to get consumption per 100 km and cost per km.
Lunar Calendar Converter
Convert between solar and Chinese lunar dates, including leap months.
Chinese Zodiac
Look up your Chinese zodiac sign and ganzhi year from your birth year.
Zodiac Sign Finder
Enter your birthday to find your Western star sign, date range and traits.
Random Picker
Paste a list and draw random winners — great for raffles and classroom pickers.
Random Group Splitter
Shuffle a list of names and split them into balanced random groups.
Random Number Generator
Generate random numbers in any range, with unique values and sorting options.
Dice Roller
Roll one or many dice online — d4, d6, d8, d12 and d20 supported.
Coin Flip
Flip a virtual coin with running heads/tails statistics — settle any decision.
Tally Counter
A big-button tap counter with adjustable step and automatic saving.
Date Countdown
Count the days to an exam, wedding or holiday with a live days-hours-minutes timer.
Sleep Cycle Calculator
Find the best bedtime or wake-up time based on 90-minute sleep cycles and feel less groggy.
Running Pace Calculator
Calculate pace from distance and time, or find the pace needed to hit a target finish time.
Body Fat Calculator
Estimate body fat percentage with the U.S. Navy formula from height, waist, neck and hip.
Office
Percentage Calculator
Three modes: percent of a number, what percent X is of Y, and change between two values.
Chinese Amount in Words
Convert amounts to Chinese RMB uppercase words for invoices and contracts.
Ratio Calculator
Simplify ratios and solve the missing term of a:b = c:x instantly.
Fraction Calculator
Add, subtract, multiply and divide fractions with automatic simplification and decimals.
Business Days Calculator
Count total days, weekdays and weekend days between two dates.
GPA Calculator
Compute credit-weighted GPA and average score with unlimited courses.
Area Converter
Convert between square meters, mu, hectares, square kilometers and square feet.
Volume Converter
Convert milliliters, liters, cubic meters, US gallons and fluid ounces.
Data Size Converter
Convert bits, bytes, KB, MB, GB and TB (binary 1024-based).
Speed Converter
Convert m/s, km/h, mph, knots and ft/s in one place.
Shoe Size Chart
CN, EU, US and UK shoe size chart by foot length in centimeters.
Clothing Size Chart
S–3XL size chart with height, chest and shoulder measurements for online shopping.
Text Compare
Compare two texts line by line with clear add and remove highlights.
Find and Replace
Batch find and replace in text with regex and case-sensitivity options.
Email Extractor
Extract, deduplicate and export all email addresses from any text.
Word Frequency Counter
Rank the most frequent words or characters in your text — great for SEO.
Lorem Ipsum Generator
Generate Chinese or Latin placeholder paragraphs for design mockups.
CSV to JSON
Paste CSV and get a JSON array, with custom delimiters and quoted fields.
JSON to CSV
Convert a JSON array into CSV, auto-detect field names and flatten nested objects — ready for Excel.
Typing Speed Test
Measure your typing speed in CPS/WPM and accuracy with Chinese or English samples.
Online Notepad
A local autosaving notepad with download — your notes never leave the browser.
Todo List
A simple local todo list with filters and autosave.
Signature Pad
Draw your signature with mouse or touch and export a transparent PNG.
Invoice Generator
Create a printable invoice with line items, quantities, tax and totals, then save it as a PDF.
Online Metronome
A precise metronome with adjustable BPM for music practice.
White Noise
Loop white, pink or brown noise with volume control for focus and sleep.
Tone Generator
Play a pure sine tone at any frequency to test hearing or audio gear.
Interval Timer
Custom work/rest interval timer with rounds and beeps — perfect for HIIT.
Merge PDF
Combine multiple PDFs into one file in any order — processed locally.
Split / Extract PDF
Extract selected pages or split every page into its own PDF file.
PDF Page Editor
Delete, rotate and reorder PDF pages, then save a new file — all in your browser.
Add Watermark to PDF
Stamp text watermarks on every page with size, color, opacity, angle and tiling options.
PDF Page Numbers
Add page numbers to any PDF with custom position, starting number, size and format.
PDF to Images
Export every PDF page as a PNG or JPG image with adjustable quality and page range.
PDF Text Extractor
Extract text from PDF files page by page and copy or download it. Scanned PDFs are not supported.
Compress PDF
Shrink PDF file size online — light mode keeps selectable text, deep mode cuts size dramatically. Fully local.
Lookup
My Browser Info
See your User-Agent, screen, CPU cores, timezone and other browser details.
World Clock
Live current time for major cities worldwide on one screen.
Time Zone Converter
Convert time between two cities for meetings across time zones.
Keyboard Keycode
Press any key to see its key name, code and keyCode for development.
Unicode Converter
Convert text to and from \u, U+ and HTML numeric Unicode formats.
Base Converter
Convert between binary, octal, decimal, hex and any base 2-36.
Roman Numerals
Convert between Arabic numbers and Roman numerals both ways.
Morse Code Translator
Translate text to Morse code and back, with letters, digits and symbols.
HTTP Status Codes
A searchable reference of HTTP status codes and what they mean.
ID Card Validator
Validate Chinese resident ID checksums and extract birth date, gender and province.
Aspect Ratio Calculator
Get the simplest ratio for any width and height, matched against common ratios.
PPI Calculator
Calculate pixel density from resolution and screen size.
User-Agent Parser
Break down any UA string into browser, engine, OS and device type, with bot detection.
MIME Types Reference
A searchable reference of 100+ file extensions and their MIME types, grouped by category.
Port Reference
What port 3306 or 8443 does — search 80+ common ports by number or service name.
ASCII Table
The full 0-127 ASCII table plus two-way conversion between characters and decimal/hex codes.
Regex Cheatsheet
Regex syntax grouped and explained with copyable examples for email, URL, IPv4 and more.
Git Cheatsheet
Common Git commands grouped by task — config, branch, remote, undo — one-click copy.
Text
Text Counter
Count words, characters, lines and paragraphs in real time — essential for writers and marketers.
Case Converter
Convert text to UPPERCASE, lowercase, Title Case or Sentence case with one click.
Text Deduplicator
Remove duplicate lines, sort, drop empty lines and trim whitespace in one click.
Text to Speech
Read any text aloud with adjustable speed, pitch and volume, with pause and resume.
Template Text Replacer
Detect {} keywords in your text, fill each one, replace all at once and compare with the original.
Text Line Sorter
Sort lines alphabetically, numerically, by length or randomly, with dedupe and blank-line options.
URL Extractor
Extract every URL and domain from text, remove duplicates and copy the clean list instantly.
Markdown Preview
Live-preview Markdown and convert it to HTML with headings, lists, code blocks, tables and links.
Emoji Picker
Browse hundreds of emojis by category, search and copy with one click, with recent-use history.
Kaomoji Generator
A collection of Japanese-style emoticons by mood — click to copy and paste into any chat.
Fancy Text Generator
Convert plain text into bold, italic, script, fullwidth and 10+ other stylish Unicode fonts.
Design
Color Picker
Pick or paste a color, convert between HEX, RGB and HSL, with a shade palette.
CSS Gradient Generator
Preview and copy CSS linear or radial gradients from two colors.
Box Shadow Generator
Tune box-shadow with sliders and copy the CSS code.
Border Radius Generator
Adjust all four corners and copy the border-radius CSS.
Font Preview
Preview system fonts at any size and weight before choosing.
Color Contrast Checker
Check WCAG contrast between text and background colors with AA/AAA pass results.
Color Palette Generator
Generate complementary, analogous, triadic and monochromatic schemes from one base color.
Encode
Developer
UUID Generator
Generate UUID v4 identifiers in bulk with one-click copy — handy for developers and testers.
JSON Formatter
Format, minify and validate JSON online with clear error messages.
Timestamp Converter
Convert Unix timestamps to dates and back, in seconds or milliseconds.
Text to Base64
Encode and decode Base64 with full UTF-8/Chinese support.
SHA Hash Calculator
Compute SHA-1, SHA-256 and SHA-512 hashes locally in your browser.
JWT Decoder
Decode JWT header and payload with automatic expiration timestamps.
Regex Tester
Test regular expressions live with match list and highlighting.
URL Parser
Break any URL into protocol, host, path and query parameters.
HTML Escape
Escape and unescape HTML special characters to prevent injection.
Slug Generator
Turn titles into clean URL slugs with lowercase and hyphens.
Subnet Calculator
Get network address, broadcast and usable hosts from IP and CIDR.
px to rem
Convert pixels to rem and back with a configurable root font size.
Cron Expression Parser
Explain any cron expression in plain language and list the next run times.
CSS Minifier
Remove comments, whitespace and line breaks from CSS to shrink file size, with a format option.
.gitignore Generator
Pick your stack — Node, Python, Java, Go and more — and generate a ready-to-use .gitignore.
SEO Meta Tag Generator
Generate description, Open Graph and Twitter card tags from your title, description and image.
robots.txt Generator
Build a robots.txt with allow/disallow rules and a sitemap reference in seconds.
HTML Formatter
Beautify or minify HTML code in one click with byte savings stats.
XML Formatter
Pretty-print or minify XML documents with structure validation and error line numbers.
SQL Formatter
Uppercase keywords, add line breaks and indentation so long queries become readable.
DNS Lookup
Query A, AAAA, MX, TXT, NS and more DNS records for any domain via Google DoH — free, no setup.
HTTP Headers Parser
Paste a raw HTTP request or response and instantly see the method, path, status code and all headers.
Query Params Editor
Parse a URL or query string into editable key-value pairs, then rebuild the link live.
curl to Code
Convert curl commands into fetch, axios, Python requests or Go code in one click.
IP Converter
Convert IPv4 addresses between dotted decimal, binary, hex and integer.
WebSocket Tester
Connect to any WebSocket endpoint, send and receive messages with a live log — great for debugging.
.htaccess Generator
Build an .htaccess file visually: HTTPS redirect, Gzip, caching, SPA rewrites and more.
JSON to TypeScript
Paste JSON and get TypeScript interfaces with automatic naming for nested objects and arrays.
XML to JSON
Convert XML documents to JSON with attributes, CDATA and comment support, plus mismatch errors.
YAML to JSON
Convert YAML config files to JSON with nested maps and lists, errors point to the exact line.
Markdown Table Generator
Paste CSV or table data and get a Markdown table with adjustable column alignment.
sitemap.xml Generator
Turn a list of URLs into a standard sitemap.xml with changefreq and priority options.
JWT Generator
Create HS256-signed JWTs locally with custom payload and expiry — for development and testing.
Mock Data Generator
Generate random fictional names, emails, phones and more, exportable as CSV for testing.
JavaScript Minifier
Strip comments and extra whitespace from JS without touching strings or regexes.
Chmod Calculator
Tick read/write/execute boxes to get octal and symbolic permissions, with 777 755 644 presets.
Utilities
QR Code Generator
Create QR codes for URLs, text, WiFi and contacts, with custom colors and sizes.
Password Generator
Create strong random passwords with custom length and character sets, generated locally.
Date Calculator
Find the days between two dates, or add and subtract days from any date.
Favicon Generator
Create favicon.ico and all standard PNG icon sizes from any image for websites and PWAs.
BMI Calculator
Calculate your Body Mass Index from height and weight, with healthy-range reference.
Unit Converter
Convert length, weight and temperature units — meters to feet, kg to pounds, °C to °F.
Screen Test
Detect dead pixels, backlight bleed and color issues with fullscreen solid colors, gradients and grid patterns.
Webcam Test
Check if your camera works, see resolution and frame rate, switch devices and capture snapshots — no driver needed.
Microphone Test
Real-time volume meter and waveform to verify your mic picks up sound, with device selection and 5-second playback.
Speaker Test
Test left/right channels, a 1 kHz tone and 20Hz–20kHz frequencies to check your headphones or speakers.
Keyboard Test
Press any key to highlight it live — spot dead keys instantly with key codes and modifier states.
Mouse Test
Check left, middle and right buttons, wheel direction and movement trail with double-click timing.
Audio Recorder
Record audio in the browser with live duration and level meter, then playback and download — no software needed.
Screen Recorder
Record your screen and download the video, optionally with microphone audio — free for lessons and demos.
Online Drawing
A browser whiteboard with pen, highlighter, lines, shapes and eraser — undo and export as PNG.
Barcode Generator
Generate Code128, EAN-13 and UPC-A barcodes with automatic check digits and PNG download.
IP Lookup
Look up any IP address for its location, ISP and timezone, or see your own public IP details.
Email Validator
Validate email address formats one by one or in bulk and export the valid list — great for form testing.
Why Choose ToolVerse?
Privacy First
All processing happens locally in your browser. Your images are never uploaded to any server.
Fast & Efficient
No uploading or downloading waits — local processing is instant and supports batch workflows.
100% Free
All tools are free forever, no sign-up required, no watermarks.
Guides & Tips
Do the Math First: BMR, Heart-Rate Zones and Daily Calories Explained
Before any diet, know your numbers: basal metabolic rate, TDEE, fat-burning heart-rate zones, exercise calories and daily water needs — calculated in minutes.
Three Calculations Before Signing a Mortgage: Payments, Interest and Compounding
Equal-payment vs equal-principal loans, how monthly payments are computed, whether early repayment pays off — plus the Rule of 72 and the true discount of bundle deals.
From Gross to Net: How Salary Deductions and Income Tax Work
Why does your payslip never match the offer letter? Social insurance, housing fund, tax brackets and special deductions explained — plus RMB amount-in-words rules for invoices.
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Image Compressor
Compress JPG, PNG and WebP images online by up to 90% with almost no visible quality loss.
Compress Image to Size
Compress any image to exactly 100KB, 200KB or a custom size — ideal for exam forms and ID uploads.
Image Resizer
Resize images by pixels or percentage, with aspect-ratio lock and size presets.