ViciousTools Aggressive tools, solving problems.

Effective, efficient, aggressive.

Tools to
Find the problem. Attack the cause. Get it solved.

Fast, focused utilities for developers, sysadmins, IT professionals, and anyone who needs to get things done.

Browse Tools

THE TOOLBOX

Tools that solve actual problems.

No accounts. No unnecessary complexity. Just useful tools for technical work.

JSON & Data

JSON Formatter & Validator

Format, validate, and minify JSON in your browser.

json formatter validator
Open Tool → Security

Password Generator

Generate secure random passwords entirely in your browser.

password generator security
Open Tool → Development

UUID Generator

Generate UUIDs instantly in your browser.

uuid guid generator
Open Tool → Encoding

Base64 Encoder & Decoder

Encode and decode Base64 text directly in your browser.

base64 encoder decoder
Open Tool → Encoding

URL Encoder & Decoder

Encode and decode URL components directly in your browser.

url encoder decoder
Open Tool → Development

Unix Timestamp Converter

Convert Unix timestamps to dates and dates to Unix timestamps in your browser.

unix timestamp timestamp epoch
Open Tool → Development

Number Base Converter

Convert numbers between binary, decimal, hexadecimal, and other bases from 2 to 36.

binary decimal hexadecimal
Open Tool → Security

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes in your browser.

hash md5 sha
Open Tool → Development

Regex Tester

Test regular expressions against text and inspect matches directly in your browser.

regex regular expression regexp
Open Tool → Networking

CIDR Calculator

Calculate IPv4 network ranges, subnet masks, broadcast addresses, and usable hosts.

cidr subnet ipv4
Open Tool → Networking

IPv4 Validator & Converter

Validate IPv4 addresses and convert them between dotted decimal, integer, hexadecimal, and binary formats.

ipv4 ip address validator
Open Tool → Development

JWT Decoder

Decode and inspect JWT headers and payloads directly in your browser.

jwt json web token decoder
Open Tool → Development

CSV ↔ JSON Converter

Convert CSV data to JSON and JSON arrays to CSV directly in your browser.

csv json converter
Open Tool → Development

JSON Diff

Compare two JSON documents and clearly identify added, removed, and changed values.

json diff compare
Open Tool → Development

Text Diff

Compare two blocks of text and identify added, removed, and changed lines directly in your browser.

text diff compare
Open Tool → Development

Unit Converter

Convert between common units of length, mass, temperature, area, volume, speed, time, and digital data.

unit converter conversion length
Open Tool →

BUILT FOR THE JOB

Useful tools, organized by what you're doing.

JSON & Data

1 tool available.

Security

2 tools available.

Development

9 tools available.

Encoding

2 tools available.

Networking

2 tools available.

PRIVATE BY DEFAULT

If your browser can do it, why send it somewhere else?

ViciousTools favors client-side processing whenever practical. That means tools can work quickly without sending your data to our servers.

No account required. No unnecessary uploads. No nonsense.

MADE FOR HUMANS. READY FOR MACHINES.

Useful from a browser. Discoverable by software.

ViciousTools is being built so its capabilities can be discovered and used by both people and software, including AI agents.

Human-friendly interfaces sit on top of clearly defined, machine-readable tools and APIs.

Explore the Tools