Useful tools.
Without the clutter.

Browse free tools by category

Calculators tools

• Percentage Calculator — Calculate percentages, increases, decreases and ratios.
• Discount Calculator — Find sale price and savings from an original price and discount.
• Loan EMI Calculator — Calculate monthly payments, total interest and total paid.
• Compound Interest Calculator — Calculate growth with recurring compounding.
• Age Calculator — Calculate age from a date of birth.
• BMI Calculator — Calculate body mass index from height and weight.
• Tip Calculator — Calculate tips and split bills between people.
• Loan Payoff Calculator — Estimate payoff time from balance, payment and interest.
• Ratio Calculator — Solve simple ratios quickly.
• Unit Converter — Convert length, weight and temperature units.
• Fraction Calculator — Add, subtract, multiply and divide fractions.
• Random Number Generator — Generate random integers within a range.
• Basic Calculator — A clean calculator with a keypad, brackets, percentages and keyboard support.
• GST / VAT Calculator — Add tax to a price or remove tax from a total, with the tax amount shown separately.
• Profit Margin Calculator — Work out profit, margin and markup, or find the price needed for a target margin.
• Simple Interest Calculator — Calculate simple interest and the total amount for a principal, rate and time.
• Percentage Change Calculator — Find the percentage increase or decrease between two values.
• Average & Statistics Calculator — Mean, median, mode, range and standard deviation for a list of numbers.
• Fuel Cost Calculator — Estimate fuel needed and trip cost from distance, efficiency and fuel price.
• Salary to Hourly Converter — Convert pay between hourly, daily, weekly, monthly and yearly amounts.
• Roman Numeral Converter — Convert numbers to Roman numerals and Roman numerals back to numbers.
• Data Storage Converter — Convert between bits, bytes, KB, MB, GB, TB and binary units like GiB.

Developer tools

• JSON Formatter & Validator — Beautify, minify and validate JSON locally.
• Base64 Encoder / Decoder — Encode and decode UTF-8 text.
• URL Encoder / Decoder — Encode or decode URL components.
• UUID Generator — Generate random UUID v4 identifiers.
• Regex Tester — Test regular expressions against sample text.
• Color Converter — Convert HEX colors to RGB and HSL.
• Timestamp Generator — Generate a current Unix timestamp instantly.
• HTML Entity Encoder — Encode or decode HTML special characters.
• SHA-256 Hash Generator — Create SHA-256 hashes in your browser.
• CSV to JSON Converter — Convert simple CSV data into JSON.
• JSON Key Explorer — Inspect JSON keys and value types.
• Number Base Converter — Convert binary, decimal, hexadecimal and other bases.
• JWT Decoder — Decode a JSON Web Token to read its header, payload and expiry.
• URL Parser — Split any URL into protocol, host, path, hash and query parameters.
• JSON Converter — Convert JSON to CSV, TSV or XML in one click.
• JSON Diff — Compare two JSON documents and list added, removed and changed keys.
• JSON ↔ YAML Converter — Convert JSON to YAML and YAML to JSON.
• YAML Formatter & Validator — Validate and neatly format YAML.
• XML Formatter — Validate, beautify or minify XML.
• String Encoder — Encode text as URL, Base64, hex, binary, HTML entities, Unicode and more at once.
• Charset Converter — Convert text to bytes in UTF-8, UTF-16 or Latin-1, and decode bytes back to text.
• Code Minifier — Minify CSS, JavaScript, HTML and JSON to reduce file size.
• SQL Formatter — Beautify SQL queries with clean keywords, line breaks and indentation.
• CSS Formatter — Beautify minified CSS into clean, readable code.
• HTML Formatter — Beautify or minify HTML with proper indentation.
• Unix Permission Calculator — Convert chmod permissions between checkboxes, octal and symbolic form.
• HTML, CSS & JS Playground — Write HTML, CSS and JavaScript and see the result live in a sandbox.
• Hash Generator (MD5, SHA) — Generate MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes for text or files.
• Cron Expression Parser — Explain a cron expression in plain English and list its next run times.
• Cron Expression Generator — Build cron schedules with simple options and preview when they run.
• IP Subnet Calculator — Calculate network, broadcast, host range and masks from an IPv4 CIDR.
• CSS Unit Converter — Convert between px, rem, em, pt, vw, vh and percent.

Text tools

• Word & Character Counter — Count words, characters and reading time.
• Case Converter — Convert text to upper, lower, title, camel and snake case.
• Remove Duplicate Lines — Remove repeated lines while preserving order.
• Character Frequency Counter — See the most common characters in your text.
• Line Sorter — Sort lines alphabetically or numerically.
• Extra Space Remover — Clean repeated spaces and blank lines.
• Extract Emails & URLs — Find email addresses and URLs inside text.
• Lorem Ipsum Generator — Generate placeholder paragraphs.
• Word Frequency Counter — Find the most common words in text.
• Text Diff Checker — Compare two texts line by line and see what was added or removed.
• Markdown Preview — Write Markdown, see a live preview and copy the generated HTML.
• Find & Replace — Find and replace text with optional regular expressions and case matching.
• Reading Time Calculator — Estimate reading and speaking time, plus word, sentence and paragraph counts.
• Morse Code Translator — Translate text to Morse code and Morse code back to text.
• Number to Words Converter — Write numbers as words in international or lakh/crore style, including currency.
• Text to Speech — Have your browser read text aloud with adjustable voice and speed.
• Text to Binary Converter — Convert text to binary, hex, octal or decimal codes and back.

Image tools

• Image Compressor — Compress images locally with adjustable quality.
• Image Resizer — Resize images to custom dimensions.
• Image to Base64 — Convert an image to a Base64 data URL.
• Image Data URL Generator — Create an embeddable image data URL.
• Image Color Picker — Pick a color directly from an image.
• Image Aspect Ratio Calculator — Calculate image dimensions from an aspect ratio.
• Image Format Converter — Convert images between PNG, JPG and WebP directly in your browser.
• Color Contrast Checker — Check text and background contrast against WCAG AA and AAA accessibility rules.
• EXIF Viewer — Read camera, date, lens and GPS metadata hidden inside a photo.
• QR Code Reader — Scan a QR code from an uploaded image or a camera photo.

PDF tools

• JPG to PDF — Prepare an image for printing or saving as PDF.
• Images to PDF Converter — Combine multiple images into one PDF, with page size and order controls.

SEO tools

• SEO Slug Generator — Create clean, lowercase URL slugs from titles.
• Meta Tag Generator — Generate essential title and description tags.
• Keyword Density Checker — Check keyword frequency and approximate density.
• SERP Snippet Preview — Preview your title and meta description as they appear in Google results.
• Robots.txt Generator — Create a robots.txt file, including rules for AI crawlers and your sitemap.
• UTM Link Builder — Add UTM campaign parameters to any URL for tracking.
• Open Graph Preview — Preview social share cards and generate Open Graph and Twitter meta tags.
• .htaccess Generator — Generate Apache rules for HTTPS, www redirects, caching, compression and more.

Time tools

• Time Zone Converter — Convert a local date/time to another time zone.
• Epoch / Unix Timestamp — Convert Unix timestamps to readable dates.
• Date Difference — Calculate days between two dates.
• Countdown Timer — Run a browser countdown.
• Date Add / Subtract — Add or subtract days from a date.
• Working Days Calculator — Count weekdays between two dates.
• Stopwatch — Run a simple browser stopwatch.
• World Clock — See the live time in several cities and time zones at once.
• Pomodoro Timer — Stay focused with work and break cycles and an alert when time is up.
• Countdown to a Date — Count down the days, hours and minutes to any event.

Security tools

• Password Generator — Generate strong random passwords locally.
• Secure Password Generator — Generate customizable passwords with instant copy.
• Password Strength Checker — Check password length and composition.
• Passphrase Generator — Create strong, memorable passphrases using secure randomness.

Generators tools

• QR Code Generator — Create QR codes for links, text and Wi-Fi details, with custom colors and PNG download.
• Barcode Generator — Generate Code 128, EAN-13, UPC and other barcodes as downloadable SVG.
• Color Palette Generator — Build complementary, analogous, triadic and monochromatic palettes from any color.
• Placeholder Image Generator — Create placeholder images of any size, with custom colors and text.
• Fake Data Generator — Generate realistic fake names, emails, phones and addresses as JSON or CSV.
• CSS Gradient Generator — Design linear and radial gradients and copy the ready-to-use CSS.
• Random Name Picker — Pick random winners from a list of names or shuffle the whole list.

Utilities tools

• Keyboard Tester — Press keys to test that every key on your keyboard works.
• User Agent Parser — Identify browser, operating system and device from a user agent string.
• MIME Type Lookup — Find the MIME type for a file extension, or the extension for a MIME type.
• HTTP Status Codes — Searchable reference for HTTP status codes and what they mean.
• Screen & Device Info — See your screen size, pixel ratio, viewport and device details.
• Typing Speed Test — Test your typing speed in WPM and accuracy.

Guides

• How to Compress Images Without Losing Quality — Learn the basics of image compression and practical file-size reduction.
• How to Format and Validate JSON — Understand formatting, validation and minification for JSON work.
• How to Calculate a Percentage — Simple formulas for discounts, increases and ratios.
• How to Write Better SEO URL Slugs — A practical approach to short, readable URLs.
• How to Resize Images for Websites — Choose useful dimensions without shipping oversized files.
• How to Create a Strong Password You Can Actually Use — Length, randomness and passphrases: what really makes a password hard to crack.
• How to Convert Images Between JPG, PNG and WebP — Pick the right format, keep transparency and avoid quality loss when converting.
• How to Create a QR Code That Scans Every Time — Make QR codes for links, text and Wi-Fi, with contrast, size and testing tips.
• How to Check Color Contrast for Accessibility — Understand WCAG AA and AAA ratios and fix text that is hard to read.
• How to Calculate Profit Margin and Markup — Learn the difference between margin and markup and price for the profit you want.
• How to Add or Remove GST and VAT Correctly — Formulas for adding tax to a price and extracting it from a total.
• How to Calculate a Loan EMI — See how the monthly instalment is worked out and how term and rate change the cost.
• How to Create a robots.txt File — Control crawler access, add your sitemap and avoid the mistakes that hide a site.
• How to Write Meta Titles and Descriptions — Write clear search snippets and preview them before you publish.
• How to Decode and Understand a JWT — Read the header, payload and expiry of a token, and why decoding is not verifying.
• How to Write Cron Expressions for Scheduled Jobs — The five cron fields, common schedules and the gotchas that trip people up.
• How to Combine Images into a PDF — Turn photos and scans into one tidy PDF with the right page size and order.

From the blog

• Why Browser-Based Tools Are Useful — Local processing can be quick, convenient and privacy-friendly for many everyday tasks.
• JSON Formatting vs Minifying — Formatting helps people read data; minifying removes unnecessary whitespace.
• JPG vs PNG vs WebP — Understand common image formats and when each is useful for websites.
• SEO Checks Before Publishing a Page — A practical checklist for titles, descriptions, slugs, links and keywords.
• How to Create Stronger Passwords — Understand length, randomness and safer password-generation habits.
• Small Tools That Speed Up Developer Work — A collection of quick browser utilities for repetitive development tasks.