AppDevTools
AppDevTools
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AppDevTools

AppDevTools

Welcome

Welcome to AppDevTools, a web app providing a number of free online developer tools. Whether you're a web or mobile app developer, let our tools assist your workflow.

We as developers realized that it'd be tiring and time consuming to search for each developer tool online just to solve a small programming problem on a daily basis. So we aim to provide high quality developer tools in one place to assist both web and mobile app developers throughout the world for free, forever.

Whether you're a web or mobile app developer, you can make use of our tools to build your app easier. We have developer tools that cover a number of categories in programming such as Case Converter, Lorem Ipsum Generator, SQL Escape, JSON Formatter, Regular Expression Tester, Password Generator, Base64 Encoder / Decoder, UNIX Timestamp Converter, and more.

Moreover, most of the developer tools we provide completely work on the client side so that you get the result instantly. We tend to build developer tools that process data on the client side if possible because not only is it fast and snappy but it's also safe and secure as everything is done on your device. However, some of our tools have to process data on the server according to the nature of the libraries we use. So you just have to wait for a few seconds to get the result, but you can rest assured that it still feels instant.

If you appreciate our developer tools or find them useful, please consider sharing AppDevTools with your developer friends. We'll be more than happy to have more users and learn more about valuable feedback from other developers.

You can keep in touch with the project by following us on Facebook and Twitter. In case you have any suggestions or encounter a bug, you can send an email to info[at]appdevtools.com or simply use the contact form. Thank you.

Text Tools

String Utilities

String Utilities is a free online developer tool to count characters, words, lines, and substrings, convert a string to lowercase, uppercase, or reverse it, and more.

Case Converter

Case Converter is a free online developer tool to convert a string to any case possible such as lowercase, uppercase, camel case, constant case, pascal case, and more.

Sort Lines

Sort Lines is a free online developer tool to sort lines alphanumerically, case-insensitively, reverse lines, shuffle lines, and add line numbers.

Diff Checker

Diff Checker is a free online developer tool to compare two strings to find the differences by line with syntax highlighting. Supports over 50 programming languages.

JSON Editor

JSON Editor is a free online developer tool to view, edit, and format JSON data with syntax highlighting including JSON Viewer for in-depth JSON inspection.

Lorem Ipsum Generator

Lorem Ipsum Generator is a free online developer tool to generate Lorem Ipsum, placeholder text, in paragraphs, sentences, or words. Supports both plain text and HTML.

URL Parser / Query String Splitter

URL Parser / Query String Splitter is a free online developer tool to parse a URL into individual components such as protocol, path, host, port, username, password, query string, and more.

Slug Generator

Slug Generator is a free online developer tool to generate SEO-friendly and human-readable URL slugs from any string. Supports multiple languages.

HTML Stripper

HTML Stripper is a free online developer tool to completely strip all the HTML tags from HTML code. Only text content will remain. Supports optional allowed tags.

Pastebin

Pastebin is a free online developer tool to paste text or code with syntax highlighting for viewing via a share link. Supports password protection.

Formatters

HTML Formatter

HTML Formatter is a free online developer tool to format HTML code to be human-friendly and more readable or minify HTML code for production.

JSON Formatter

JSON Formatter is a free online developer tool to format JSON data to be human-friendly and more readable or minify JSON data to be more compact for production.

XML Formatter

XML Formatter is a free online developer tool to format XML code to be human-friendly and more readable or minify XML code for production.

SQL Formatter

SQL Formatter is a free online developer tool to format SQL queries to be human-friendly and more readable or minify SQL queries for production.

CSS Beautifier / Minifier

CSS Beautifier / Minifier is a free online developer tool to beautify CSS code to be human-friendly and more readable or minify CSS code for production.

JavaScript Beautifier / Minifier

JavaScript Beautifier / Minifier is a free online developer tool to beautify JS code to be human-friendly and more readable or minify JS code for production.

Escapers and Unescapers

HTML Escape / Unescape

HTML Escape / Unescape is a free online developer tool to escape special HTML characters to their HTML entities or unescape HTML entities to their original characters.

JavaScript Escape / Unescape

JavaScript Escape / Unescape is a free online developer tool to escape or unescape JavaScript special characters to their corresponding ones. Supports Unicode point escapes.

JSON Escape / Unescape

JSON Escape / Unescape is a free online developer tool to escape or unescape JSON special characters to their corresponding ones.

XML Escape / Unescape

XML Escape / Unescape is a free online developer tool to escape special XML characters to their XML entities or unescape XML entities to their original characters.

SQL Escape / Unescape

SQL Escape / Unescape is a free online developer tool to escape SQL queries to prevent SQL injection or unescape SQL queries to their original unsafe string. Supports backslash escapes.

Validators

HTML Validator

HTML Validator is a free online developer tool to validate HTML code against the W3C standards. Supports partial HTML code validation.

JSON Validator

JSON Validator is a free online developer tool to validate JSON data. Errors including line numbers and excerpt code will be printed if any.

YAML Validator

YAML Validator is a free online developer tool to validate a YAML file. Errors including line numbers and excerpt code will be printed if any.

Credit Card Validator

Credit Card Validator is a free online developer tool to validate a credit card number and find the card type. Completely works offline for your privacy and safety.

Regular Expression Tester

Regular Expression Tester is a free online developer tool to test regular expressions against any string with matches highlighted.

Cryptography and Security

Hash Generator

Hash Generator is a free online developer tool to generate the hash value of a string. Supports MD5, SHA-1, SHA-224, SHA-256, SHA-512, SHA-384, SHA-3, and RIPEMD160.

HMAC Generator

HMAC Generator is a free online developer tool to generate an HMAC from a string with a secret key. Supports MD5, SHA-1, SHA-224, SHA-256, SHA-512, SHA-384, SHA-3, and RIPEMD160.

Checksum Calculator

Checksum Calculator is a free online developer tool to calculate the checksum of a file without uploading it. Supports MD5, SHA-1, SHA-224, SHA-256, SHA-512, SHA-384, SHA-3, and RIPEMD160.

Password Generator

Password Generator is a free online developer tool to generate strong and secure passwords that are difficult to crack with highly customizable options.

Bcrypt Generator

Bcrypt Generator is a free online developer tool to generate a bcrypt hash from a string or check if a string matches a bcrypt hash.

UUID Generator

UUID Generator is a free online developer tool to generate one or multiple UUIDs in version 1 (timestamp) and version 4 (random). Supports uppercase and braces.

Encoders and Decoders

URL Encoder / Decoder

URL Encoder / Decoder is a free online developer tool to encode a URL string to comply with the URL standard or decode a URL string to a human-friendly one.

HTML Entity Encoder / Decoder

HTML Entity Encoder / Decoder is a free online developer tool to encode a string to HTML entities or decode HTML entities to their original characters.

Base32 Encoder / Decoder

Base32 Encoder / Decoder is a free online developer tool to encode a string to Base32 or decode Base32 to a string according to RFC 4648. Supports UTF-8.

Base58 Encoder / Decoder

Base58 Encoder / Decoder is a free online developer tool to encode a string or HEX to Base58 or decode Base58 to a string or HEX.

Base64 Encoder / Decoder

Base64 Encoder / Decoder is a free online developer tool to encode a string to Base64 or decode Base64 to a string. Supports UTF-8.

Base64 Image Encoder / Decoder

Base64 Image Encoder / Decoder is a free online developer tool to encode a binary image to Base64 or decode Base64 to a binary image without uploading it.

Converters

String / HEX Converter

String / HEX Converter is a free online developer tool to convert a string to HEX or HEX to a string. Unicode is supported.

JavaScript / JSON Converter

JavaScript / JSON Converter is a free online developer tool to convert between JavaScript objects and JSON data with your preferred indentation level.

CSV / JSON Converter

CSV / JSON Converter is a free online developer tool to convert between CSV and JSON data with highly customizable options.

JSON / XML Converter

JSON / XML Converter is a free online developer tool to convert between JSON and XML data with your preferred indentation level.

JSON / PHP Array Converter

JSON / PHP Array Converter is a free online developer tool to convert between JSON data and PHP arrays with your preferred indentation level and quote type.

Base Converter

Base Converter is a free online developer tool to convert any base numbers between binary, octal, decimal, and hexadecimal.

Unit Converter

Unit Converter is a free online developer tool to convert a value from a unit to another such as length, area, mass, volume, temperature, time, digital, speed, and more.

UNIX Timestamp Converter

UNIX Timestamp Converter is a free online developer tool to convert between Epoch/UNIX timestamps and datetimes via the datetime picker. Supports both UTC and local timezone.

Image Tools

Color Picker

Color Picker is a free online developer tool to pick a color from the palette including lighter, darker, and negative colors. Supports HEX, RGB, and HSL.

QR Code Generator

QR Code Generator is a free online developer tool to generate a QR code image from any string. Supports plain text, URL, WiFi, email, phone number, SMS, and geolocation.

QR Code Reader

QR Code Reader is a free online developer tool to read the QR code data from a QR code image file without uploading it. Supports colored QR code.

EXIF Viewer

EXIF Viewer is a free online developer tool to view the EXIF metadata of an image file if exists without uploading it. Supports both JPEG and TIFF formats.

Network Tools

My IP

My IP is a free online developer tool to look up for your current IP address and the info regarding your geolocation such as city, region, country, timezone, ASN, and ISP.

IP Lookup

IP Lookup is a free online developer tool to look up for the geolocation of an IP address such as city, region, country, latitude, longitude, timezone, ASN, and ISP.

IP / Number Converter

IP / Number Converter is a free online developer tool to convert between IP addresses and numbers; i.e. binary, decimal, and hexadecimal. Supports both IPv4 and IPv6.

CIDR / IP Converter

CIDR / IP Converter is a free online developer tool to convert CIDR to IP ranges including network address, first address, last address, netmask, total IPs, and more.

WHOIS Lookup

WHOIS Lookup is a free online developer tool to look up for the WHOIS info of a domain name such as registrar, creation date, expiration date, ownership info, and more.

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