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Free online tools that just work

Text, developer, encoder, converter and calculator tools that run instantly in your browser. Nothing to install, nothing uploaded.

Popular: JSON Formatter & Viewer Password Generator QR Code Generator Case Converter BMI Calculator JavaScript Beautifier

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16 tools

Text Tools

Free online text tools to count words and characters...

17 tools

Developer Tools

Free developer tools: format and validate JSON, enco...

6 tools

Generators

Free online generators for strong passwords, QR code...

8 tools

Converters

Free online converters — turn colors between HEX, RG...

9 tools

Calculators

Free everyday calculators — work out your exact age...

7 tools

Data & Converters

Free online data converters — convert between CSV, J...

7 tools

Web & Design

Free web & design tools — check WCAG color contrast,...

10 tools

Encoders & Ciphers

Free online encoders, decoders and ciphers — Base64,...

2 tools

Networking

Free networking tools — calculate IP subnets and CID...

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JSON Formatter & Viewer Paste JSON to beautify, validate and explore it in a live collapsible tree — with search, expand/collapse and JSONPath.

Word Counter Type or paste your text to see live word, character, sentence and paragraph counts, plus estimated reading time.

Password Generator Create strong, random passwords. Adjust the length and character types, then copy your new password.

Base64 Encode / Decode Convert text to and from Base64. Everything runs in your browser and is UTF-8 safe.

QR Code Generator Turn any text, link or contact detail into a QR code and download it as PNG or SVG.

Case Converter Paste text and convert it between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case and kebab-case.

Hash Generator Type text to instantly generate MD5, SHA-1, SHA-256 and SHA-512 hashes.

JavaScript Beautifier Paste minified or messy JavaScript to get clean, indented, readable code.

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Word Counter Type or paste your text to see live word, character, sentence and paragraph counts, plus estimated reading time.

Case Converter Paste text and convert it between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case and kebab-case.

Text Diff Checker Paste two versions of your text to see a line-by-line comparison with additions and removals highlighted.

JSON Formatter & Viewer Paste JSON to beautify, validate and explore it in a live collapsible tree — with search, expand/collapse and JSONPath.

Base64 Encode / Decode Convert text to and from Base64. Everything runs in your browser and is UTF-8 safe.

URL Encode / Decode Percent-encode text for safe use in URLs, or decode an encoded URL back to readable text.

Hash Generator Type text to instantly generate MD5, SHA-1, SHA-256 and SHA-512 hashes.

Password Generator Create strong, random passwords. Adjust the length and character types, then copy your new password.

QR Code Generator Turn any text, link or contact detail into a QR code and download it as PNG or SVG.

Lorem Ipsum Generator Generate classic Lorem Ipsum placeholder text — choose how many paragraphs, sentences or words you need.

UUID Generator Generate one or many random version-4 UUIDs and copy them instantly.

Color Converter Pick a color or type a value to convert instantly between HEX, RGB and HSL with a live preview.

Age Calculator Enter your date of birth to see your exact age in years, months and days, plus a countdown to your next birthday.

Percentage Calculator Answer the three most common percentage questions instantly — no formulas to remember.

CSV to JSON Paste CSV (with a header row) and get a clean JSON array instantly.

JSON to CSV Paste a JSON array of objects and get CSV you can open in Excel or Sheets.

YAML to JSON Paste YAML and get valid, formatted JSON instantly.

JSON to YAML Paste JSON and get clean YAML for your config files.

XML to JSON Paste XML and get a JSON representation of its elements and attributes.

Query Params to JSON Paste a URL or query string and get its parameters as JSON.

Timestamp Converter Convert a Unix timestamp (seconds or milliseconds) to UTC, local and ISO dates.

Number Base Converter Convert a number between binary, octal, decimal and hexadecimal — type in any field.

CSS Units Converter Convert a CSS value between px, rem, em, pt and % using your root font size.

Unit Converter Convert between units of length, weight and temperature instantly.

JWT Decoder Paste a JWT to decode its header and payload and check its expiry.

Regex Tester Enter a regular expression and a test string to see live matches and capture groups.

SQL Minifier Strip comments and collapse whitespace to compress SQL into a single line.

SVG Viewer Paste SVG markup to see it rendered live, with its dimensions.

Random String Generator Generate a random string with the length and character types you choose.

Color Contrast Checker Pick a text and background color to check the WCAG contrast ratio and AA/AAA pass.

Markdown Preview Type Markdown on the left and see it rendered live on the right.

Slug Generator Turn a title or any text into a clean, URL-friendly slug.

Remove Line Breaks Strip line breaks from text, or replace them with spaces.

Sort & Dedupe Lines Sort lines A→Z or Z→A, or remove duplicate lines.

Reverse Text Reverse your text by characters, words or lines.

Text to Binary Convert text to 8-bit binary and back again.

Word Frequency Counter See how often each word appears in your text, ranked by frequency.

Online Notepad A distraction-free notepad that autosaves to your browser as you type.

Find and Replace Text Paste text, enter what to find and what to replace it with — with optional case-insensitive and regex matching.

Remove Duplicate Lines Remove repeated lines from a list while keeping the original order.

Remove Extra Spaces Tidy messy text by collapsing repeated spaces or removing whitespace entirely.

Text Repeater Repeat a word, phrase or line as many times as you want, with an optional separator.

HTML to Markdown Paste HTML and get clean Markdown you can drop into a README or blog post.

HTML Entity Encode / Decode Escape text to HTML entities, or decode entities back to characters.

Text to Hex Converter Convert text to hex bytes and decode hex back to readable text.

ROT13 Encoder / Decoder Apply the ROT13 letter-substitution cipher — the same action encodes and decodes.

Morse Code Translator Convert text to Morse code and decode Morse back to text.

Caesar Cipher Shift letters by any amount to encode or decode a Caesar cipher.

Base32 Encode / Decode Convert text to and from Base32 (RFC 4648).

Text to ASCII Converter Convert text to decimal ASCII/character codes and back.

HMAC Generator Compute an HMAC from a message and secret key using SHA-1/256/384/512.

Base58 Encode / Decode Convert text to and from Base58 (the Bitcoin alphabet).

Unicode Escape / Unescape Convert characters to \uXXXX escape sequences and back.

JSON to XML Paste JSON and get a well-formed XML representation.

JSON Validator Paste JSON to check if it is valid; invalid JSON shows the exact error.

SQL Formatter Paste SQL to get a clean, indented, readable query.

HTML Beautifier Paste minified or messy HTML to get clean, indented markup.

CSS Beautifier Paste minified CSS to get clean, indented, readable styles.

JavaScript Beautifier Paste minified or messy JavaScript to get clean, indented, readable code.

CSS Minifier Strip comments and whitespace to compress your CSS.

HTML Minifier Remove comments and collapse whitespace to compress your HTML.

Cron Expression Generator Build a cron expression from a schedule, or paste one to read it in plain English.

Robots.txt Generator Build a robots.txt to control how search engines crawl your site.

Meta Tag Generator Enter your page details to generate SEO and Open Graph meta tags.

Random Number Generator Draw random numbers within a range, with optional uniqueness.

Data Size Converter Convert between bytes, KB, MB, GB and TB in decimal or binary units.

Roman Numeral Converter Convert a number to Roman numerals, or Roman numerals back to a number.

Time Zone Converter Convert a date and time from one time zone to another.

Currency Converter Convert an amount between world currencies using live daily rates.

BMI Calculator Enter your height and weight to calculate your Body Mass Index and category.

Loan / EMI Calculator Work out your monthly loan payment (EMI), total interest and total repayment.

GPA Calculator Add your courses, grades and credits to calculate your weighted GPA.

Discount Calculator Enter a price and a percentage off to see the final price and your savings.

Tip Calculator Work out the tip and split the total between any number of people.

Date Difference Calculator Pick two dates to see the exact time between them.

Countdown Timer Count down to any future date and time, live.

IP Subnet Calculator Enter an IPv4 address and CIDR prefix to get the full subnet breakdown.

MAC Address Generator Generate random MAC addresses in your preferred format.

Color Palette Generator Pick a base color to generate shades, tints and a matching palette.

CSS Gradient Generator Build a linear or radial CSS gradient and copy the code.

Box Shadow Generator Design a CSS box-shadow with a live preview and copy the code.

Border Radius Generator Round corners independently and copy the CSS border-radius.

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Frequently asked questions

Are these tools really free?

Yes. Every tool is completely free with no sign-up, no account and no limits. The site is supported by unobtrusive ads placed below the tools.

Is my data private?

Completely. Every tool runs entirely in your browser using JavaScript, so the text and files you work with are never uploaded to any server.

Do the tools work offline?

Many do. Once a tool page has loaded, most tools keep working even if you lose your connection, because the processing happens on your device.

Do I need to install anything?

No. Everything runs in your web browser — there is nothing to download or install.

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