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Popular Tools

Domain Availability Checker

Check whether a domain name is registered or available, usin...

SSL Certificate Checker

Instantly check a domain's SSL certificate status, expiry da...

DNS Lookup

Instantly look up A, AAAA, MX, TXT, NS, CNAME, SOA, and CAA...

Domain Age Checker

Check how old a domain name is.

Website Status Checker

Instantly check any website's uptime status, HTTP status cod...

WHOIS / RDAP Lookup

Look up a domain's registration details - registrar, registr...

Security Headers Checker

Scan a website's HTTP response for recommended security head...

SPF Checker

Check whether a domain has a valid SPF record configured.

DMARC Checker

Check whether a domain has a DMARC policy configured.

SEO Health Score

A combined on-page SEO overview - title, meta description, c...
Complete Catalogue

All Free Tools

Every one of our 330+ tools, grouped by category.

SSL Tools DNS Tools Domain Tools Website Tools Security Tools Email Tools Performance Tools SEO Tools API & Developer Testing Tools Git & GitHub Tools DevOps Tools Linux & System Administration Tools Database & SQL Tools AWS & Cloud Tools Kubernetes Tools Programming Language Tools Frontend / CSS Tools Image / SVG Developer Tools Security & Authentication Tools File & Data Conversion Tools Data / Number / Computer Science Tools

Website Tools

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Website Status Checker

Instantly check any website's uptime status, HTTP status code, and res...

IP Address Lookup

Look up a website's server IP address, IPv4/IPv6, and reverse DNS.

HTTP Status Checker

Check the HTTP status code any website returns.

HTTP Headers Checker

View every HTTP response header a website sends.

Redirect Checker

Check whether a website redirects and where it ends up.

Website Response Time Checker

Check how fast a website responds to a request.

Robots.txt Checker

Check whether a website has a robots.txt file and view its contents.

Sitemap Checker

Check whether a website has an XML sitemap.

Favicon Checker

Check whether a website has a favicon set up correctly and see exactly...

Website Technology Checker

Detect the CMS, JavaScript framework, analytics tools, and server tech...

HTML Validator

Check a webpage's HTML for structural errors, missing tags, and access...

CSS Validator

Check a webpage's CSS (inline and linked stylesheets) for common synta...

JSON Formatter

Instantly format and pretty-print any JSON, right in your browser.

JSON Validator

Instantly check whether your JSON is valid, right in your browser.

JSON Minifier

Instantly minify JSON by removing whitespace, right in your browser.

URL Encoder / Decoder

Instantly encode or decode URLs and query strings, right in your brows...

Base64 Encoder / Decoder

Instantly encode or decode Base64 text, right in your browser.

Unix Timestamp Converter

Instantly convert Unix timestamps to human-readable dates, and back, r...

Broken Link Checker

Check a page for broken outbound links.

Website Charset Checker

Check a website's declared character encoding (charset) - HTTP header...

HTML Minifier

Instantly minify HTML by removing unnecessary whitespace and comments,...

JavaScript Minifier

Instantly compact JavaScript by removing unnecessary whitespace, right...

URL Parser

Instantly break a URL down into its protocol, host, path, query parame...

Git & GitHub Tools

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Git Command Generator

Pick a common Git task - clone, commit, branch, merge, rebase, and mor...

Git Command Builder

A flexible builder for constructing Git commands from a subcommand, fl...

Git Branch Name Generator

Turn a short task description into a clean, conventional Git branch na...

Git Commit Message Generator

Generate a Conventional Commits-style message from a change type, opti...

.gitignore Generator

Generate a .gitignore file for your stack - Laravel, Node.js, React, P...

Gitignore Checker

Test whether a specific file or folder path would be ignored by your ....

Git Diff Viewer

Paste two versions of a text and see a clear, color-coded line-by-line...

Git Merge Conflict Helper

Paste a merge conflict block and clearly see the current (HEAD) side v...

Git URL Parser

Parse a Git repository URL (HTTPS or SSH) and extract the host, owner,...

GitHub URL Parser

Parse a GitHub URL and identify the owner, repository, branch, file pa...

GitHub Repository URL Generator

Build common GitHub URLs - repository, branch, file, issue, or pull re...

GitHub Actions YAML Generator

Generate a starting GitHub Actions workflow YAML for common scenarios...

GitHub Actions Validator

Paste a GitHub Actions workflow YAML and check it for common structura...

GitHub Actions Cron Helper

Build and understand the cron schedule expression used by GitHub Actio...

Git Tag Generator

Generate a clean Git tag name for a release, in v1.0.0, 1.0.0, or rele...

Semantic Version Generator

Assemble a valid SemVer version from major, minor, patch, prerelease,...

Changelog Generator

Turn a list of changes into a structured, Markdown-formatted CHANGELOG...

README Generator

Generate a clean, well-structured Markdown README from your project's...

DevOps Tools

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Dockerfile Generator

Generate a clean Dockerfile from a base image, working directory, depe...

Docker Compose Generator

Generate a docker-compose.yml with an application service plus optiona...

Docker Compose Validator

Paste a docker-compose.yml and check it for common structural problems...

Docker Run to Docker Compose Converter

Paste a docker run command and convert its supported flags into a dock...

Docker Command Generator

Pick a common Docker operation - pull, run, build, logs, exec, and mor...

.dockerignore Generator

Generate a .dockerignore file for your stack to keep unnecessary files...

Docker Compose Environment Validator

Paste your Docker Compose environment variables and check for missing...

GitLab CI Generator

Generate a .gitlab-ci.yml for common build, test, and deploy pipelines...

Jenkinsfile Generator

Generate a declarative Jenkinsfile with build, test, and deploy stages...

CI/CD Pipeline Generator

Define generic pipeline stages - checkout, build, test, deploy - and e...

Terraform Formatter

Paste Terraform/HCL code and get it cleanly indented and consistently...

Terraform Configuration Generator

Generate a starting Terraform configuration - provider, resource, vari...

Ansible Playbook Generator

Generate a YAML Ansible playbook for common tasks like package install...

Ansible Inventory Generator

Generate an Ansible inventory file in INI or YAML format with groups,...

CloudFormation Template Generator

Generate a basic AWS CloudFormation template (YAML or JSON) for a comm...

Infrastructure Config Generator

Define an application's environment, services, ports, domains, and dep...

Linux & System Administration Tools

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chmod Calculator

Convert between numeric (755) and symbolic (rwxr-xr-x) Linux file perm...

Chown Command Generator

Generate a safe chown command from an owner, group, and file path - wi...

Linux Command Generator

Pick a common Linux task - files, permissions, processes, networking,...

Linux Command Cheat Sheet

A searchable reference of common Linux commands, organized by category...

Cron Expression Builder

Build a standard 5-field cron expression from a friendly schedule pick...

Crontab Generator

Build one or more complete crontab entries - schedule, command, and co...

systemd Service Generator

Generate a systemd .service unit file with description, working direct...

Nginx Config Generator

Generate an Nginx server block for a static site, PHP/Laravel app, or...

Apache .htaccess Generator

Generate common Apache .htaccess rules - HTTPS redirect, www/non-www r...

Nginx Redirect Generator

Generate Nginx redirect rules - 301/302, HTTP to HTTPS, www to non-www...

Nginx Reverse Proxy Generator

Generate an Nginx reverse proxy configuration with backend host/port,...

SSH Command Generator

Generate SSH connection commands - custom port, identity file, jump ho...

SSH Config Generator

Generate an SSH client config block (~/.ssh/config) with Host alias, H...

SCP Command Generator

Generate an scp command for copying files to or from a remote server,...

Rsync Command Generator

Generate rsync commands for local or remote synchronization, with arch...

Linux Path Converter

Normalize a Linux path - resolve . and .. segments, collapse repeated...

Environment Variable Formatter

Clean up and normalize a list of KEY=value environment variable defini...

Database & SQL Tools

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SQL Query Formatter

Format messy SQL into clean, readable, properly indented SQL - SELECT,...

SQL Query Validator

Check SQL syntax for common structural errors - unbalanced parentheses...

SQL Minifier

Minify SQL by removing unnecessary whitespace and comments, while pres...

SQL to JSON Converter

Convert SQL INSERT statements or a simple result-set-style table into...

JSON to SQL Converter

Convert a JSON array of objects into SQL INSERT statements, with an op...

CSV to SQL Converter

Convert CSV data into SQL INSERT statements, with the first row used a...

SQL INSERT Generator

Generate a SQL INSERT statement from a table name, columns, and one or...

SQL UPDATE Generator

Generate a SQL UPDATE statement from a table, columns to set, and a WH...

SQL DELETE Generator

Generate a SQL DELETE statement with a required WHERE condition and a...

SQL Table Generator

Visually define columns, types, and constraints, then generate a CREAT...

SQL WHERE Builder

Visually build a SQL WHERE clause with common operators and AND/OR gro...

SQL JOIN Builder

Visually build an INNER, LEFT, RIGHT, FULL OUTER, or CROSS JOIN betwee...

SQL Query Generator

Build a complete SELECT statement visually - table, columns, WHERE, JO...

Database Schema Designer

Visually design a multi-table database schema - tables, columns, prima...

MySQL Data Type Reference

A searchable reference of MySQL data types - numeric, string, date/tim...

PostgreSQL Data Type Reference

A searchable reference of PostgreSQL data types - numeric, character,...

SQL Server Data Type Reference

A searchable reference of SQL Server data types - numeric, character,...

MongoDB Query Formatter

Format a MongoDB query/filter document into clean, readable, properly...

MongoDB Query Generator

Generate common MongoDB operations - find, insertOne/Many, updateOne/M...

Redis Command Builder

Generate common Redis commands - GET, SET, DEL, EXPIRE, INCR, hash, li...

AWS & Cloud Tools

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AWS ARN Parser

Parse an AWS ARN and break it down into partition, service, region, ac...

AWS ARN Generator

Build a valid AWS ARN from a service, region, account ID, and resource...

AWS Region Lookup

Look up AWS region codes, names, and locations - search by code or nam...

AWS Availability Zone Lookup

Look up how many Availability Zones a given AWS region has, and unders...

AWS S3 URL Generator

Generate common S3 object and bucket URL formats - virtual-hosted styl...

S3 Policy Generator

Generate an S3 bucket policy JSON document with selectable actions, re...

AWS IAM Policy Generator

Generate an IAM policy JSON document with selectable Effect, Actions,...

IAM Policy JSON Validator

Paste IAM or S3 bucket policy JSON and check its structure - required...

AWS Cron Expression Helper

Build and explain AWS EventBridge/CloudWatch-style cron expressions, w...

AWS CLI Command Generator

Generate common AWS CLI commands for EC2, S3, Lambda, and IAM - text o...

AWS CLI S3 Command Generator

Generate AWS CLI S3 commands - cp, sync, rm, mb, and presigned URLs -...

Cloud Cost Calculator

Estimate monthly cloud infrastructure costs from your own hourly/month...

AWS Instance Comparison

Compare common EC2 instance types side by side - vCPU, memory, and arc...

AWS Region Time Converter

Convert a time between your local timezone and the typical timezone of...

Cloud Resource Naming Generator

Generate consistent, convention-following names for cloud and infrastr...

Cloud Tag Generator

Generate a consistent set of resource tags (key-value metadata) for cl...

Programming Language Tools

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JavaScript Formatter

Format and beautify JavaScript with consistent indentation, entirely i...

JS Escape/Unescape

Escape a string for safe use inside JavaScript source, or unescape an...

JS Object Viewer

Paste a JavaScript object literal or JSON and view it as an interactiv...

JS Regex Tester

Test a JavaScript regular expression against sample text and see match...

PHP Formatter

Format and beautify PHP code with consistent indentation, entirely in...

PHP Array to JSON

Convert a PHP array literal into valid JSON.

JSON to PHP Array

Convert JSON into an equivalent PHP array literal, ready to paste dire...

PHP var_dump Formatter

Paste raw PHP var_dump() output and get it displayed in a clean, reada...

PHP Serialized Data Decoder

Safely decode PHP's serialize() string format into readable structured...

Python Formatter

Format and re-indent Python source code consistently, entirely in your...

Python JSON Formatter

Format JSON or Python dict-literal syntax (single quotes, True/False/N...

Python Requirements Generator

Build a requirements.txt file from package names and version constrain...

Python Package Name Checker

Check whether a name follows valid PyPI package-naming syntax rules -...

Code Indentation Tool

Re-indent code using a configurable number of spaces or tabs.

Code Line Counter

Count total, blank, non-blank, and comment lines in any pasted code.

Code Comment Remover

Strip common single-line and block comments from code in several langu...

Code Beautifier

A multi-language code beautifier - choose JavaScript, PHP, Python, JSO...

Code Minifier

A multi-language code minifier - choose JavaScript, CSS, HTML, or JSON...

Code to JSON

Convert a loosely-formatted object/array literal (unquoted keys, singl...

JSON to TypeScript

Generate a TypeScript interface from JSON, inferring property types au...

JSON to Python

Convert JSON into an equivalent Python dict/list literal, ready to pas...

JSON to JavaScript

Convert JSON into a JavaScript object/array literal, ready to paste di...

Frontend / CSS Tools

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CSS Gradient Generator

Build linear or radial CSS gradients visually with multiple color stop...

CSS Box Shadow Generator

Build a CSS box-shadow visually - offset, blur, spread, color, and ins...

CSS Border Radius Generator

Set each corner's border radius individually with a live preview, and...

CSS Button Generator

Design a button visually - background, text, border, radius, padding,...

CSS Flexbox Generator

Build a flexbox layout visually - container and item properties both c...

CSS Grid Generator

Build a CSS Grid layout visually - columns, rows, gaps, and item place...

CSS Transform Generator

Build a CSS transform visually - translate, rotate, scale, and skew -...

CSS Animation Generator

Build a CSS @keyframes animation visually and get the full animation d...

CSS Clip Path Generator

Build a CSS clip-path shape visually - common practical shapes with ed...

CSS Filter Generator

Combine CSS filter functions visually - blur, brightness, contrast, gr...

CSS Text Shadow Generator

Build a CSS text-shadow visually - offset, blur, and color - with a li...

CSS Triangle Generator

Build a pure-CSS triangle using the border trick - direction, size, an...

CSS Glassmorphism Generator

Generate a frosted-glass CSS card style - background blur, transparenc...

CSS Neumorphism Generator

Generate a soft-UI neumorphism CSS style - dual light/dark shadows on...

CSS Color Palette Generator

Generate a harmonious color palette from one base color - complementar...

CSS Unit Converter

Convert between CSS units - px, rem, em, pt, vw, vh, and percent - wit...

PX to REM Converter

Convert pixel values to rem, with a configurable root font size - the...

REM to PX Converter

Convert rem values to pixels, with a configurable root font size shown...

PX to EM Converter

Convert pixel values to em, based on the relevant parent/element font...

CSS Specificity Calculator

Paste a CSS selector and see its specificity broken down as an (inline...

Image / SVG Developer Tools

View all

SVG Formatter

Paste SVG markup and get it cleanly re-indented, with malformed XML cl...

SVG Minifier

Remove unnecessary whitespace and comments from SVG markup to reduce i...

SVG Optimizer

Optimize SVG markup more aggressively than minification alone - remove...

SVG to Data URI

Convert SVG markup into a data URI, ready to use directly in CSS backg...

Data URI to Image

Paste an image data URI and get a live preview plus a downloadable ima...

Image to Base64

Upload an image and get its raw Base64-encoded content - client-side,...

Base64 to Image

Paste a raw Base64 string and a MIME type, and get a preview plus down...

SVG to PNG Converter

Convert SVG to a downloadable PNG image, with configurable output dime...

SVG to JPG Converter

Convert SVG to a downloadable JPG image with a solid background - JPG...

Favicon Generator

Upload an image and generate a complete set of common favicon sizes pl...

ICO Generator

Convert an image into a valid, downloadable .ico file - the multi-reso...

Image Dimension Checker

Upload an image and instantly see its width, height, aspect ratio, and...

Image Metadata Viewer

View the file-level metadata a browser can read from an image - dimens...

WebP Converter

Convert an image to WebP using your browser's own encoder, with an adj...

AVIF Converter

Convert an image to AVIF using your browser's own encoder where availa...

Image Aspect Ratio Calculator

Calculate an image's simplified aspect ratio from its width and height...

Image Placeholder Generator

Generate a simple placeholder image with configurable dimensions, back...

BlurHash Generator

Generate a BlurHash string from an image - a compact placeholder repre...

File & Data Conversion Tools

View all

CSV to JSON Converter

Convert CSV data to JSON - handles quoted fields, commas inside values...

JSON to CSV Converter

Convert a JSON array of objects to CSV - correctly quotes values conta...

CSV to XML Converter

Convert CSV data to XML - each row becomes an XML element with column...

XML to CSV Converter

Convert XML with repeated sibling elements to CSV - flattens each repe...

JSON to XML Converter

Convert JSON to well-formed XML - objects become nested elements, arra...

XML to JSON Converter

Convert XML to JSON - nested elements become nested objects, attribute...

JSON to YAML Converter

Convert JSON to clean, properly-indented YAML using a real YAML serial...

YAML to JSON Converter

Convert YAML to JSON using a real YAML parser - handles nested mapping...

YAML to XML Converter

Convert YAML to well-formed XML by first parsing the YAML structure, t...

XML to YAML Converter

Convert XML to YAML by first parsing the XML into structured data, the...

TSV to CSV Converter

Convert tab-separated values (TSV) to comma-separated values (CSV) - c...

CSV to TSV Converter

Convert comma-separated values (CSV) to tab-separated values (TSV) - p...

INI to JSON Converter

Convert INI configuration files to JSON - sections become nested objec...

JSON to INI Converter

Convert a flat or one-level-nested JSON object to INI format - nested...

TOML to JSON Converter

Convert TOML configuration files to JSON - supports tables, arrays, st...

JSON to TOML Converter

Convert JSON to TOML - objects become tables, arrays of objects become...

Markdown to HTML Converter

Convert Markdown to clean HTML with a live, sanitized preview - headin...

HTML to Markdown Converter

Convert HTML to clean Markdown - preserves headings, lists, links, emp...

HTML to Text Converter

Strip HTML markup and extract clean, readable plain text - preserves p...

Text to HTML Converter

Convert plain text to safely-escaped HTML - preserves line breaks and...

Data / Number / Computer Science Tools

View all

Binary Calculator

Perform addition, subtraction, multiplication, and division directly o...

Binary to Decimal Converter

Convert a binary number to its exact decimal value, with the place-val...

Decimal to Binary Converter

Convert a decimal number to its exact binary representation, with the...

Hex to Decimal Converter

Convert a hexadecimal number to its exact decimal value, handling arbi...

Decimal to Hex Converter

Convert a decimal number to its exact hexadecimal value, handling arbi...

Octal Converter

Convert between octal and decimal (and binary/hex) - exact conversion...

Number Base Converter

Convert a number between any two bases from 2 to 36 - binary, octal, d...

Bitwise AND/OR/XOR Calculator

Calculate bitwise AND, OR, XOR, and NOT on two numbers - shows binary...

Bit Shift Calculator

Calculate left and right bit shifts - clearly distinguishes arithmetic...

Byte Converter

Convert between bits, bytes, KB, MB, GB, TB, and PB - decimal (1000-ba...

Bits to Bytes Converter

Convert bits to bytes (and back) - the fundamental 8-bits-per-byte con...

KB/MB/GB/TB Converter

Convert between KB, MB, GB, and TB - decimal and binary conventions cl...

Data Transfer Speed Calculator

Calculate transfer time from file size and connection speed - correctl...

Download Time Calculator

Estimate download time from file size and connection speed - handles b...

Storage Calculator

Calculate total storage needed for a quantity of items at a given size...

File Size Calculator

Estimate raw file size from parameters - image dimensions and color de...

Percentage Calculator

Calculate percentages - X% of Y, percentage increase/decrease, percent...

Modulo Calculator

Calculate the remainder of a division - clearly explains how negative...

Scientific Notation Converter

Convert between standard decimal numbers and scientific notation - han...

Roman Numeral Converter

Convert between Roman numerals and decimal numbers - validates malform...

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