All free online tools
129 tools in 11 categories. Most run in your browser, so your files never leave your device. The few that need the internet are marked.
Calculators & Finance
13 toolsWork out percentages, GST, loan EMIs, SIP returns, take-home pay and unit conversions.
Tip & Bill Split Calculator
Calculate tips, split group bills, round per person, and copy SMS summary.
Fuel Cost Calculator
Calculate road trip gas costs, fuel consumed, and passenger splits.
Percentage Calculator
Find X% of Y, percentage change and percentage difference.
GST Calculator
Add or remove GST at 5%, 18% or 40%, with the CGST/SGST or IGST split.
EMI Calculator
Monthly EMI, total interest and repayment schedule for any loan.
Discount Calculator
Sale price and savings, including stacked discounts and coupons.
SIP Calculator
Project the future value of a monthly SIP investment.
Compound Interest Calculator
See how savings grow with compounding and regular deposits.
BMI Calculator
Body Mass Index, healthy weight range and WHO category.
CTC to In-Hand Salary Calculator
Estimate monthly in-hand pay from your annual CTC.
Scientific Calculator
Standard and scientific calculator with history and keyboard input.
Unit Converter
Convert length, weight, temperature, area, volume, speed and data.
PDF & Documents
10 toolsEdit, merge, split, rotate and convert PDFs, including PDF to Word and images to PDF.
Image to PDF Converter
Combine JPG, PNG and WebP images into a single PDF.
PDF to Word Converter
Turn a PDF into an editable Word document, or Word into PDF.
Unlock PDF
Remove the password and print or copy restrictions from PDFs you are allowed to open.
Merge PDF
Combine several PDFs into one file, in the order you choose.
PDF Page Counter & Inspector
Count a PDF's pages and see its sizes, metadata, encryption and what makes it large.
Split PDF
Pull out specific pages or page ranges into a new PDF.
PDF to JPG Converter
Save every PDF page as a JPG or PNG image.
Rotate PDF
Turn PDF pages 90°, 180° or 270° and save the fixed file.
Add Page Numbers to PDF
Stamp page numbers on a PDF in the position you choose.
PDF Editor
Edit PDF text, fill forms, add signatures and reorder pages.
Image & Media
21 toolsCompress, resize, crop and convert images, make QR codes and barcodes, and trim video.
QR Code Generator
Make QR codes for links, Wi-Fi, contacts and more. PNG or SVG.
QR Code Scanner
Read a QR code from your camera, an image or a screenshot.
Barcode Generator
Create EAN, UPC, Code 128 and other barcodes for print or web.
Barcode Scanner
Scan product and shipping barcodes with your camera or an image.
Compress Image
Shrink JPG, PNG and WebP images to a target size like 50 KB.
Remove Watermark
Erase stamps, dates and logos from photos, or add your own watermark.
PNG to JPG Converter
Convert PNG to JPG, filling transparent areas with a colour you pick.
PNG to SVG Converter
Trace a PNG or JPG into a scalable SVG vector.
JPG to PNG Converter
Convert JPG photos to lossless PNG.
Image to WebP Converter
Convert JPG and PNG to WebP for smaller, faster-loading images.
WebP to JPG Converter
Convert WebP images to JPG or PNG that open anywhere.
Crop Image
Crop to 1:1, 16:9, 9:16 or any custom size.
Resize Image
Resize images to exact pixels or a percentage, keeping proportions.
Favicon Generator
Turn a logo into every favicon and app icon size a site needs.
Video Player
Play MP4, WebM and MOV files from your device with speed control.
Audio Player
Play MP3, WAV, FLAC and M4A files with a playlist.
Cut Video
Trim a video to a start and end point without re-encoding.
Remove Audio from Video
Mute a video, or extract its audio track as a separate file.
Aspect Ratio Calculator
Work out ratios like 16:9 and the matching width or height.
EXIF Metadata Viewer
See the camera, date and location hidden in a photo, and remove them.
Online Camera
Take clearer photos and videos in your browser, with filters.
Text & Writing
9 toolsCount words, change case, compare, sort and clean text, or dictate and listen to it.
Word Counter
Count words, characters, sentences and reading time as you type.
Case Converter
Switch text to UPPER, lower, Title, camelCase, snake_case and more.
Text Diff Checker
Compare two texts and see exactly what was added or removed.
Online Notepad
A quick notepad that saves to your browser as you type.
Text to Speech
Hear any text read aloud with your device's voices.
Lorem Ipsum Generator
Generate placeholder text by paragraphs, sentences or words.
URL Slug Generator
Turn a title into a clean, SEO-friendly URL slug.
Text Sorter & Duplicate Remover
Sort lines A–Z or by length, and remove duplicate lines.
Date & Time
11 toolsFind your exact age, count days or business days between dates, convert timestamps and time things.
Countdown Timer
Run several countdown timers with an alarm, or count down to a date.
Pomodoro Timer
25/5 focus and break cycles with a daily session counter.
HIIT & Tabata Interval Timer
Work and rest intervals with tones: Tabata, HIIT, EMOM, boxing.
World Clock & Meeting Planner
See the time in any city and find a meeting time across time zones.
Work Hours Calculator
Calculate shift hours, weekly timesheets, unpaid breaks, and overtime pay.
Age Calculator
Your exact age in years, months and days, plus your next birthday.
Date Difference Calculator
Days, weeks and months between two dates, or add time to a date.
Business Days Calculator
Count working days and hours between dates, minus weekends and holidays.
Unix Timestamp Converter
Convert epoch timestamps to readable dates and back.
Online Stopwatch
A stopwatch with laps, and a countdown timer with an alarm.
Time Format Converter
Convert between 12-hour AM/PM, 24-hour and military time instantly.
Business & Marketing
3 toolsPrice with confidence: profit margins, break-even points, ROI and campaign tracking links.
Profit Margin Calculator
Margin, markup and the selling price you need to hit a target.
UTM Builder
Build campaign tracking links, or strip tracking from a URL.
Break-Even Calculator
Units and revenue needed to break even, plus projected ROI.
Random & Games
4 toolsFlip a coin, roll dice, draw random numbers, pick a name or spin a wheel, with fair, unbiased randomness.
Coin Flip
Flip a fair coin online: heads or tails, or flip many at once.
Dice Roller
Roll d4, d6, d20, d100 or any dice notation like 4d6kh3.
Random Number Generator
Generate fair random numbers: ranges, no repeats, decimals, PINs.
Random Name Picker & Wheel
Spin a wheel, draw winners or split names into teams.
AI Tools
11 toolsSummarise, rewrite and simplify text, extract keywords, explain JSON and read text in images.
LLM Token Counter
Estimate BPE tokens, context limits, and API costs for GPT-4o, Claude, and Gemini.
AI Prompt Optimizer
Build structured XML system prompts with role isolation and negative rules.
AI Function Calling Schema
Build OpenAI Structured Output and Anthropic Tool Call JSON schemas.
Prompt & Context Cleaner
Strip markdown, HTML, comments, and mask PII to reduce token consumption.
AI Code & Formula Explainer
Plain-English explanations of formulas, calculations and code.
Optional cloud mode
AI Text Rewriter
Rewrite text in a professional, friendly, concise or formal tone.
Optional cloud mode
AI JSON Explainer
Get a plain-English walkthrough of what a JSON payload contains.
Optional cloud mode
Developer & Data
24 toolsFormat and validate JSON, encode Base64 and URLs, decode JWTs, test regex and convert data.
Regex Builder
Build a regular expression from blocks, with live matches.
SQL Formatter
Format, beautify, and minify SQL queries for Postgres, MySQL, and SQLite.
JSON to YAML Converter
Convert bidirectional JSON to YAML and YAML to JSON with presets.
Chmod Permissions Calculator
Interactive 3x3 Linux permissions matrix, octal sync, and command generator.
Docker Run to Compose
Convert docker run CLI commands into docker-compose.yml files.
CSS Box Shadow Generator
Multi-layer CSS box shadows with live preview and Tailwind export.
Glassmorphism Generator
Create modern CSS frosted glass effects with backdrop blur and border glow.
PX to REM Converter
Convert PX to REM and calculate responsive fluid clamp() typography.
SVG to Data URI Converter
Clean and encode SVG markup into UTF-8 and Base64 Data URIs.
Color Palette Generator
Generate 11-step Tailwind color shades with WCAG accessibility contrast.
JSON Formatter
Format, validate and minify JSON with exact error locations.
Base64 Encoder & Decoder
Encode text or files to Base64, or decode Base64 back to text or a file.
JWT Decoder
Decode a JWT, see what each claim means, and verify its signature.
UUID Generator
Generate v4 and time-ordered v7 UUIDs in bulk, or inspect any UUID.
URL Encoder & Decoder
Percent-encode text for URLs, or decode an encoded URL.
Sample File Generator
Create test images, PDFs, CSV, JSON or video at an exact file size.
JSON to CSV Converter
Convert JSON arrays to CSV, and CSV back to JSON.
Regex Tester
Test regular expressions with live match and group highlighting.
HTML Entity Encoder & Decoder
Escape or unescape HTML characters as named, decimal or hex entities.
Color Converter
Convert any CSS colour to HEX, RGB, HSL, OKLCH and more, with shades and palettes.
JSON to TypeScript Converter
Generate TypeScript interfaces from a JSON sample.
Cron Expression Explainer
Read cron schedules in plain English and build new ones.
Color Contrast Checker
Check text and background colours against WCAG AA and AAA.
Markdown Table Generator
Build Markdown and HTML tables in a spreadsheet-style grid.
API, HTTP & Network
21 toolsTest your internet speed, look up status codes and headers, parse URLs, send requests and turn cURL into fetch, Axios or Python.
HTTP Status Code Lookup
Look up any HTTP status code: meaning, causes and how to fix it.
HTTP Header Analyzer
Paste HTTP headers to see what each means and what to fix.
HTTP Header Generator
Generate security, CORS, cache and CSP headers for your server.
User-Agent Parser
Identify the browser, OS, device or bot behind a User-Agent.
URL Parser
Break a URL into scheme, host, port, path, query and fragment.
Query String Parser
Turn a query string into a table or JSON, decoded.
Query String Builder
Build a correctly encoded query string from rows or JSON.
cURL Command Generator
Build a correct curl command from a form, for any shell.
cURL to Fetch Converter
Convert a curl command to JavaScript fetch code.
cURL to Axios Converter
Convert a curl command to Axios code for JavaScript.
cURL to Python Converter
Convert a curl command to Python requests, httpx or urllib.
cURL to JavaScript Converter
Convert curl to fetch, XMLHttpRequest, Node.js https or jQuery.
HTTP Method Reference
GET, POST, PUT, PATCH, DELETE: safe, idempotent, cacheable.
MIME Type Lookup
Find the MIME type for any file extension, and back.
Content-Type Header Checker
Pick, check or detect the right Content-Type header.
Subnet Calculator
IPv4 & IPv6 CIDR subnet calculator with binary bit breakdown.
MAC Address Lookup
Identify hardware vendors, normalize MAC formats, and decode OUI bits.
IPv4 to IPv6 Converter
Convert IPv4 to mapped, 6to4, hex, and compress or expand IPv6.
SSL Certificate Decoder
Inspect X.509 certificates and CSRs, validity dates, SANs, and keys.
Security & Generators
2 toolsGenerate strong passwords and cryptographic hashes without anything leaving your device.
Password Generator
Create strong random passwords with your choice of length and symbols.
Hash Generator
Hash text or files and check them against a published checksum.
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