Developer Tools

40+ free utilities that run entirely in your browser. No signup, no tracking.

🔗 Networking

IP, MAC, and network utility tools

All Networking→
SUB

IPv4 Subnet Calculator

Calculate IPv4 subnets from CIDR

IP4

IPv4 Address Converter

Convert IPv4 between decimal, binary, hex

RNG

IPv4 Range Expander

Expand CIDR or IP range to address list

OUI

MAC Address Lookup

Look up MAC address vendor/OUI

MAC

MAC Address Generator

Generate random MAC addresses

IP6

IPv6 ULA Generator

Generate IPv6 ULA prefixes (RFC 4193)

GCP

GCP Virtual Network Planner

Plan and simulate GCP networks

{ } Formatters

Format and beautify your code instantly

All Formatters→
{ }

JSON Formatter

Format & validate JSON

.*

Regex Tester

Test regex patterns

MD

Markdown Preview

Preview Markdown live

SQL

SQL Formatter

Format SQL queries

XML

XML Formatter

Format & validate XML

HTML

HTML Formatter

Format & beautify HTML

JS

JavaScript Beautifier

Beautify or minify JS

CSS

CSS Beautifier

Beautify or minify CSS

🔐 Encoders & Decoders

Encode, decode, and hash data

All Encoders & Decoders→
B64

Base64 Encode/Decode

Encode & decode Base64

JWT

JWT Decoder

Decode JWT tokens

%

URL Encode/Decode

Encode & decode URLs

&;

HTML Entity Encoder

Encode/decode HTML entities

#!

Hash Generator

Generate MD5/SHA hashes

SSL

Certificate Details Viewer

Inspect SSL certificates

HMAC

HMAC Generator

Generate HMAC signatures

JS\

JavaScript Escape

Escape JS strings

J\

JSON Escape

Escape JSON strings

X\

XML Escape

Escape XML characters

SQL\

SQL Escape

Escape SQL strings

CSV\

CSV Escape

Escape CSV fields

✨ Generators

Generate UUIDs, lorem ipsum, and more

All Generators→
CLK

Cron Expression Generator

Build cron expressions

ID

UUID Generator

Generate UUIDs

Aa

Lorem Ipsum Generator

Generate placeholder text

PWD

Password Generator

Generate secure passwords

QR

QR Code Generator

Generate QR codes

⇄ Converters

Convert between data formats

All Converters→
CSV

JSON to CSV Converter

Convert JSON to CSV

T

Unix Timestamp Converter

Convert timestamps

#

Color Converter

Convert color formats

YML

YAML to JSON Converter

Convert YAML & JSON

X→J

XML to JSON Converter

Convert XML to JSON

J→X

JSON to XML Converter

Convert JSON to XML

C→J

CSV to JSON Converter

Convert CSV to JSON

C→X

CSV to XML Converter

Convert CSV to XML

URL

URL Parser

Parse URL components

✓ Validators

Validate formats, expressions, and data

All Validators→
✓H

HTML Validator

Validate HTML markup

XP

XPath Tester

Test XPath expressions

CC

Credit Card Validator

Validate credit card numbers