Online tools for everyday work
A growing collection of free browser-based utilities. Nothing is uploaded to a server: every conversion, hash and calculation happens on your own device.
135 free tools
Developer tools
Hashing, encoding, decoding and formatting helpers for everyday development work.
MD5 Generator
Generate an MD5 hash from any text instantly. Free online MD5 generator that runs entirely in your browser — no upload, no sign-up, no limits.
SHA Hash Generator
Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes from any text online. Fast, free and fully client-side using the browser's Web Crypto API.
Base64 Encoder & Decoder
Encode text to Base64 or decode Base64 back to text online. Supports UTF-8, emoji and URL-safe Base64. Free, instant and fully client-side.
URL Encoder & Decoder
Encode or decode URLs and query strings online. Handles percent encoding, spaces, special characters and Unicode. Free and instant, no sign-up.
JSON Formatter & Validator
Format, validate and minify JSON online. Pretty-print with 2, 4 or 8 spaces, sort keys alphabetically and get clear syntax error messages. Free and private.
UUID Generator
Generate up to 100 random UUID v4 (GUID) values at once. Cryptographically secure, optional uppercase and braces, free and fully client-side.
JWT Decoder
Decode a JSON Web Token to inspect its header, payload and expiry. Runs entirely in your browser — the token is never sent anywhere.
URL Slug Generator
Turn any title into a clean, SEO-friendly URL slug. Removes accents and Turkish characters, collapses spaces and supports hyphen or underscore separators.
CSV to JSON Converter
Convert CSV to JSON and JSON to CSV in your browser. Auto-detects the delimiter, handles quoted fields, keeps numbers as numbers. Free, no upload.
Regex Tester
Test JavaScript regular expressions against sample text with live match highlighting, capture groups, flags and find-and-replace. Free, runs in your browser.
Diff Checker
Compare two texts, files or code snippets line by line and see every added and removed line highlighted. Ignore case or whitespace. Free, private, in your browser.
Markdown to HTML Converter
Convert Markdown to clean HTML with a live preview. Supports GitHub Flavored Markdown tables, task lists and code blocks. Copy the HTML or download a full page. Runs in your browser.
SQL Formatter
Format SQL queries with consistent indentation and keyword casing, or minify them to one line. Supports MySQL, PostgreSQL, SQLite, SQL Server, Oracle, BigQuery, Snowflake and more. Free, in-browser.
Cron Expression Parser
Paste a cron expression and see exactly what each field means and the next run times in your timezone. Supports ranges, steps, lists, names and @daily-style shortcuts. Free.
YAML to JSON Converter
Convert YAML to JSON or JSON to YAML in your browser. Handles multi-document files, anchors and nested structures, with clear error messages for invalid input. Free.
JSON Diff
Compare two JSON or YAML documents and list every added, removed and changed value with its path. Key order and formatting are ignored. Free, runs in your browser.
HTML Formatter
Beautify messy or minified HTML with proper indentation using Prettier. Choose indent size and line width. Free, instant, runs in your browser.
CSS Formatter
Format minified or messy CSS into clean, readable rules with Prettier. Choose indentation and line width. Free and instant in your browser.
JavaScript Formatter
Beautify minified or messy JavaScript with Prettier: indentation, quotes, semicolons and line width. Free, instant, in your browser.
HTML Minifier
Minify HTML by removing comments and unnecessary whitespace while keeping pre, textarea, script and style blocks intact. Free, instant, in your browser.
CSS Minifier
Minify CSS with csso: remove comments and whitespace, merge rules and shorten values safely. See the byte savings. Free, instant, in your browser.
JavaScript Minifier
Minify JavaScript with Terser: strip whitespace and comments, shorten variable names and compress expressions. Free, instant, private.
XML Formatter
Format XML with clean indentation, minify it to one line, and check that it is well-formed with line-numbered errors. Free, instant, in your browser.
XML to JSON Converter
Convert XML to JSON and JSON to XML in your browser. Attributes are kept with an @_ prefix, numbers and booleans are parsed. Free, instant, private.
HTML Entity Encoder / Decoder
Encode special characters as HTML entities (<, &, ©) or decode entities back to text. Named or numeric output. Free and instant.
HMAC Generator
Compute an HMAC of a message with a secret key using SHA-1, SHA-256, SHA-384 or SHA-512. Hex and Base64 output. Runs with Web Crypto in your browser.
AES Encrypt / Decrypt Text
Encrypt text with AES-256-GCM and a password, or decrypt it back. Keys derived with PBKDF2. Everything runs in your browser; nothing is sent anywhere.
Bcrypt Hash Generator
Generate bcrypt password hashes with a chosen cost factor and verify a password against an existing hash. Runs in your browser, nothing is uploaded.
TOTP Generator
Generate time-based one-time passwords (TOTP) from a Base32 secret, like Google Authenticator. Live countdown, otpauth URI, SHA-1/256/512. In your browser.
URL Parser
Break any URL into its parts: scheme, user, host, port, path, query string and fragment, with every query parameter decoded. Free, instant, in your browser.
User Agent Parser
See your browser, version, engine, operating system and device, or paste any user agent string to decode it. Free, instant, in your browser.
JSON to TypeScript
Paste JSON and get TypeScript interfaces with nested types, arrays, optional keys and null unions. Free, instant, runs in your browser.
HTTP Status Codes
Searchable reference of every HTTP status code with its reason phrase, plain-English meaning and RFC. From 100 Continue to 511 Network Authentication Required.
MIME Type Lookup
Find the MIME type for any file extension, or the extension for a content type: images, video, audio, documents, fonts and archives. Searchable table.
CSS Gradient Generator
Build linear, radial and conic CSS gradients with live preview. Drag colour stops, set the angle and copy the background property. Free, no sign-up.
CSS Box Shadow Generator
Set offset, blur, spread, colour and inset with sliders and copy the box-shadow CSS. Live preview, works in the browser, free.
Meta Tag Generator
Generate title, description, canonical, Open Graph and Twitter Card meta tags. Length warnings included. Free, instant, in your browser.
robots.txt Generator
Create a robots.txt file: allow or block crawling, list disallowed paths, set crawl-delay, block AI crawlers and add your sitemap URL.
XML Sitemap Generator
Paste your URLs and get a valid sitemap.xml with lastmod, changefreq and priority. Free, instant, runs entirely in your browser.
Docker Run to Compose
Paste a docker run command and get the equivalent docker-compose.yml service: ports, volumes, environment, restart policy, networks and command.
Text tools
Generate, count, rewrite and clean up text without installing anything.
Password Generator
Generate strong random passwords up to 128 characters with a live entropy score. Cryptographically secure, offline-capable and never transmitted.
Word & Character Counter
Count words, characters, sentences, paragraphs and lines in real time, plus estimated reading and speaking time. Free, instant and private.
Case Converter
Convert text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case and CONSTANT_CASE instantly.
Lorem Ipsum Generator
Generate lorem ipsum placeholder text by paragraphs, sentences or words. Classic opening line optional, instant copy, completely free.
Random Number Generator
Generate random numbers in any range, with or without repeats, roll dice or flip a coin. Uses your browser's cryptographic random source. Free and instant.
Remove Duplicate Lines
Paste a list and remove duplicate lines instantly. Options for case-insensitive matching, trimming spaces, dropping empty lines and sorting. Free, in your browser.
Password Strength Checker
Test how strong a password is: entropy, weaknesses like dictionary words and sequences, estimated crack times, and an optional check against known data breaches. Nothing is sent unless you ask.
Sort Lines
Sort text lines alphabetically A–Z or Z–A, by number, by length, reversed or shuffled. Remove duplicates and empty lines. Free, instant, in your browser.
Find and Replace
Replace text in bulk with match case, whole word and regular expression options, including capture groups. See the number of replacements. Free and instant.
Text Statistics
Analyse any text: words, characters, sentences, paragraphs, unique words, average lengths, syllables, Flesch readability score, reading time and top words.
Number to Words
Convert any number into words, up to the quadrillions, with decimals and negatives, in English, Turkish, Spanish, German or French. Free and instant.
Converters
Convert units, colors and number systems instantly and accurately.
Length Converter
Convert length and distance between metric and imperial units: meters, feet, inches, miles, kilometers, light years and more. Free and instant.
Weight Converter
Convert weight and mass between kilograms, pounds, ounces, stone, grams and tonnes. Exact factors, instant results, free and fully client-side.
Data Storage Converter
Convert digital storage between bytes, KB, MB, GB, TB and the binary KiB, MiB, GiB and TiB units. Shows why a 1 TB drive reports as 931 GB.
Speed Converter
Convert speed between kilometres per hour, miles per hour, metres per second, knots and feet per second. Exact factors, instant results, free.
Area Converter
Convert area between square metres, square feet, square yards, acres, hectares and square kilometres. Exact factors, instant results, free.
Volume Converter
Convert volume between litres, millilitres, US and UK gallons, quarts, pints, cups and fluid ounces. Exact factors, instant results, free.
Temperature Converter
Convert temperature between Celsius, Fahrenheit, Kelvin and Rankine at once. Enter one value and see all four scales instantly. Free and accurate.
Number Base Converter
Convert numbers between binary, octal, decimal, hexadecimal and any base from 2 to 36. Handles arbitrarily large integers with no precision loss.
Color Converter
Convert colors between HEX, RGB, HSL and CMYK with a live preview and color picker. Paste any format and copy the one you need. Free and instant.
Time Converter
Convert between seconds, minutes, hours, days, weeks, months and years instantly. Free online time unit converter with milliseconds and centuries too.
Pressure Converter
Convert pressure between bar, psi, pascal, kPa, MPa, atmospheres, torr, mmHg and inHg instantly. Free online pressure unit converter with exact factors.
Roman Numeral Converter
Convert numbers to Roman numerals and Roman numerals to numbers instantly. Shows how each numeral is built, with a table of common values from 1 to 3999.
MP4 to MP3
Extract the audio track from an MP4, M4A or MOV file and save it as MP3. Choose the bitrate. Free, no upload, no file size limit from a server.
Audio Converter
Convert audio between MP3 and WAV in the browser: pick the bitrate, downmix to mono. Works with MP4, M4A, OGG, WebM and FLAC sources. Free.
Audio Trimmer
Cut a section out of an audio file by start and end time and save it as MP3 or WAV. Runs entirely in your browser, nothing is uploaded.
Image tools
Compress, resize and convert images right in your browser, without uploading them anywhere.
Image Converter & Compressor
Convert images to WebP, JPEG or PNG and compress them in your browser. Resize, pick a quality, download. No upload, no sign-up, works offline.
Image Compressor
Compress images in bulk to a smaller file size, or to an exact target like 100 KB, without uploading them. Adjust quality and dimensions, keep the format. Free and private.
Image Resizer
Resize any image to exact pixel dimensions or a percentage, keep the aspect ratio, and export as JPG, PNG or WebP. Free, instant and private: nothing is uploaded.
SVG to PNG Converter
Convert SVG files or code to PNG, JPEG or WebP at 1× to 8× scale or an exact width, with a transparent or solid background. Free, instant, runs in your browser.
HEIC to JPG Converter
Convert HEIC and HEIF photos from iPhone or iPad to JPG, PNG or WebP in your browser. Batch conversion, quality control, ZIP download. No upload, no watermark.
QR Code Generator
Create QR codes for links, text, Wi-Fi networks, email, phone numbers, SMS and contact cards. Choose colours, size and error correction, then download as PNG or SVG. Free, no sign-up.
Favicon Generator
Turn a logo or image into a complete favicon set: favicon.ico, 16/32/48 px PNGs, 180 px Apple touch icon, 192 and 512 px Android icons and a web manifest, with the HTML to paste. Free, in-browser.
Image to Text (OCR)
Extract text from images and scanned PDFs with OCR in your browser. Supports English, Turkish, Spanish, German, French and more. Copy the text or download it. Files are never uploaded.
Crop Image
Crop JPG, PNG and WebP images in your browser. Drag to select, pick 1:1, 4:3 or 16:9 presets, or type exact pixels. Free, instant, no upload.
Rotate & Flip Image
Rotate a photo by 90, 180 or any angle and flip it horizontally or vertically. Works with JPG, PNG and WebP in your browser. Free and instant.
Image to Base64
Convert an image to a Base64 data URI for embedding in HTML, CSS or JSON, or decode Base64 back into an image. Runs in your browser, no upload.
EXIF Viewer & Remover
View the EXIF metadata hidden in a photo — camera, lens, exposure, date and GPS location — and download a clean copy with all metadata removed. In your browser.
Color Palette from Image
Upload a photo or logo and get its dominant colors as HEX codes, a swatch strip and ready-to-use CSS variables. Free, instant, runs in your browser.
Barcode Generator
Create barcodes online in CODE128, EAN-13, EAN-8, UPC-A, CODE39, ITF-14 and more. Download as SVG or high-resolution PNG. Free, instant, private.
Add Text to Image
Put text on a photo in your browser: choose font, size, colour, outline and position. Nothing is uploaded, download the result as PNG.
Meme Generator
Make a meme from your own image with classic top and bottom text, Impact font and a black outline. No upload, no watermark, free.
Photo Collage Maker
Combine photos into a grid collage: set columns, spacing, cell shape and background colour, then download a PNG. No upload, no sign-up.
PDF tools
Merge, split, compress, protect and convert PDF files on your own device. Nothing is uploaded.
Merge PDF
Combine several PDF files into a single document in the order you choose. Runs entirely in your browser: no upload, no file size limit, no watermark.
Split PDF
Extract a page range from a PDF, split it every N pages, or save every page as its own file. Free, private, runs in your browser with a ZIP download.
Compress PDF
Shrink PDF files by recompressing their images, with an extreme mode for scans and a lossless clean-up. Free, no upload, no page limit, no watermark.
JPG to PDF Converter
Turn JPG, PNG, WebP and other images into a single PDF, one image per page, on A4, Letter or fitted pages with optional margins. No upload, no watermark.
PDF to JPG Converter
Convert every page of a PDF into JPG or PNG images at 72 to 300 dpi, download them one by one or as a ZIP. Free, private, no upload.
Rotate PDF
Rotate PDF pages by 90 degrees, all at once or one by one, reorder them and delete the ones you don't need. Free, private, runs in your browser.
Protect PDF with Password
Encrypt a PDF with AES-256, set a password to open it and choose whether readers may print, copy or edit. Free, runs in your browser, nothing is uploaded.
Unlock PDF
Remove the password and permission restrictions from a PDF you know the password of. Free, private, done entirely in your browser.
Add Watermark to PDF
Stamp a text watermark such as CONFIDENTIAL or DRAFT on every page of a PDF, with your own size, colour, angle and opacity, centred or tiled. Free and private.
Add Page Numbers to PDF
Stamp page numbers onto a PDF in your browser: choose corner or centre, top or bottom, a format like “Page 3 of 10”, the starting number and the first page to number. Free, no upload.
PDF to Text Converter
Extract all text from a PDF in your browser and copy it or download a .txt file. Keeps page order, marks page breaks and counts words. No upload, no sign-up.
Delete PDF Pages
Remove one or more pages from a PDF in your browser. Enter page numbers or ranges, download the trimmed file. Free, no upload, no watermark.
Extract PDF Pages
Pull specific pages out of a PDF into a new file. Enter pages or ranges like 1-3, 7 and download. Free, private, works in your browser.
Crop PDF
Cut the margins off PDF pages in millimetres or percent, with a live preview. Apply to all pages or a range. Free, in your browser, no upload.
Flatten PDF
Flatten a filled PDF form so the answers become permanent page content that cannot be edited. Runs in your browser; no upload, no account.
PDF Metadata Editor
View and edit the title, author, subject, keywords, creator and dates of a PDF, or strip all metadata for privacy. Free, in your browser, no upload.
Sign PDF
Add your signature to a PDF: draw it with mouse or finger, type your name, or upload an image. Place it on any page and download. Private, in your browser.
Compare PDF
Compare two PDF files and highlight added and removed lines of text. Perfect for contract revisions and document versions. Free, private, in your browser.
Multiple PDF Pages per Sheet
Put 2, 4, 6, 9 or 16 PDF pages on a single sheet to save paper. Choose sheet size, orientation and margin. Free, browser-only, no upload.
Resize PDF Pages
Change the page size of a PDF to A4, A3, A5, Letter, Legal or Tabloid. Content is scaled and centred, with a margin you choose. Free, no upload.
Searchable PDF from a Scan
Turn a scanned PDF or photo into a searchable PDF with an invisible OCR text layer. Ten languages, runs in your browser, no upload.
Calculators
Quick calculators for percentages and other everyday maths.
Percentage Calculator
Calculate a percentage of a number, what percent one number is of another, percentage change, and add or subtract a percentage. Free and instant.
Loan Calculator
Calculate the monthly payment, total interest and full amortisation schedule of a loan. Free, instant and calculated entirely in your browser.
VAT Calculator
Add VAT to a net amount or strip VAT out of a gross total. Any rate, one-tap presets, instant net / VAT / gross breakdown. Free and private.
BMI Calculator
Calculate your body mass index from height and weight, in centimetres and kilograms or inches and pounds. Shows your WHO category and healthy weight range.
Discount Calculator
Work out the final price after a discount, how much you save, what percentage a sale price represents, or a restaurant tip split between friends. Free and instant.
Compound Interest Calculator
See how savings grow with compound interest. Set the deposit, rate, years, compounding frequency and monthly contributions to get a year-by-year table. Free and instant.
Calorie Calculator
Find how many calories you burn per day (BMR and TDEE) and the daily intake for losing or gaining weight, using the Mifflin-St Jeor equation. Free and instant.
Currency Converter
Convert between euros, dollars, pounds, lira, yen and 25 other currencies with daily reference rates from the European Central Bank. Free, no sign-up.
IBAN Validator
Validate any IBAN instantly: checks the country code, length and ISO 7064 check digits, formats it in groups of four and identifies Turkish banks. Free, runs in your browser.
Unit Price Calculator
Compare products by price per kilogram, litre, piece or metre to find the best value. Enter price, quantity and unit for each item; the cheapest is highlighted with the percentage others cost more. Free.
Mortgage Calculator
Calculate your monthly mortgage payment from price, down payment, rate and term. See total interest, a yearly amortization table and the effect of extra payments.
Body Fat Calculator
Estimate your body fat percentage from height, neck, waist and hip measurements using the US Navy formula. Fat mass, lean mass and category. Free.
BMR Calculator
Calculate your basal metabolic rate with the Mifflin-St Jeor and Harris-Benedict formulas and your daily calorie needs for each activity level. Free and instant.
Ideal Weight Calculator
Find your ideal body weight for your height and sex with four standard formulas plus the healthy BMI range. Metric and imperial. Free and instant.
Pace Calculator
Calculate running pace per km or mile from distance and time, predict finish times for 5K, 10K, half and full marathon, and get per-kilometre splits. Free.
GPA Calculator
Calculate your term GPA from letter grades and credits, and your cumulative GPA including previous semesters. Standard 4.0 scale with plus and minus grades.
Grade Calculator
Calculate your weighted course grade from assignments and exams, and find out what score you need on the final to reach your target. Free and instant.
Fraction Calculator
Add, subtract, multiply or divide two fractions and get the simplified result as a fraction, mixed number and decimal. Also converts decimals to fractions.
Standard Deviation Calculator
Paste a list of numbers to get sample and population standard deviation, variance, mean, median, mode, range, quartiles and standard error. Free and instant.
Credit Card Validator
Check whether a credit card number is valid with the Luhn algorithm and detect the card type: Visa, Mastercard, Amex, Discover, Troy and more. In your browser.
Time tools
Timers, timestamps and date maths for anything measured in hours or years.
Unix Timestamp Converter
Convert a Unix timestamp to a readable UTC and local date, or turn a date into an epoch value. Handles seconds and milliseconds automatically.
Age Calculator
Work out an exact age from a date of birth: years, months and days, plus totals in weeks, days and hours and the countdown to the next birthday.
Online Timer & Stopwatch
A free online countdown timer and stopwatch with one-tap presets and an alarm sound. No download, no sign-up, works in any browser.
Date Calculator
Count the days, weeks, months and weekdays between two dates, or add and subtract days, weeks, months and years from a date. Free and instant.
Time Zone Converter
Convert a date and time between time zones and compare several cities at once. Daylight saving is handled automatically. Free, instant, works in your browser.
Hours Calculator
Add up work hours for the week from start and end times with breaks. Get total hours, decimal hours and pay at an hourly rate. Free timesheet calculator.
Business Days Calculator
Count working days between two dates excluding weekends and your holidays, or add a number of business days to a date to find a deadline. Free and instant.
Network tools
Inspect your connection and the request your browser is sending.
What Is My IP Address
See your public IP address plus your connection details: country, TLS version, HTTP protocol and user agent. Instant, free and no tracking.
DNS Lookup
Look up the DNS records of any domain: A, AAAA, CNAME, MX, NS, TXT, SOA, CAA and SRV, with TTL and DNSSEC status. Free online DNS checker with no sign-up.
IP Subnet Calculator
Calculate network address, broadcast, usable host range, subnet mask and wildcard mask from an IPv4 address and CIDR prefix. Shows binary and address type. Free, instant.
IPv6 Subnet Calculator
Calculate an IPv6 network from an address and prefix: expanded and compressed forms, first and last address, number of addresses and /64 subnets, address type and reverse DNS name. Free, instant.