Free tools for developers & writers, right in your browser

11small, single-purpose tools — slugify text, clean up duplicate lines, generate UUIDs and passwords, calculate dates and investment growth, and more. Nothing you type is ever sent to a server, and there's nothing to sign up for.

Calculators

Investment Growth Calculator
Model compound interest, contributions, tax, and inflation
Date Calculator
Days between two dates, or a date N days before/after another

Text Tools

URL Slug Generator
Turn text into a clean, SEO-ready URL slug
Remove HTML Tags
Strip markup and get plain text
Remove Duplicate Lines
Deduplicate a list, keep first occurrence
Extract URLs From Text
Pull every http(s) link out of a blob of text
Count Duplicate Lines
See how many times each line repeats
Unescape HTML Entities
Decode & and friends back to literal characters
Case Converter
Switch between UPPERCASE, camelCase, snake_case, and more

Generators

Random Password Generator
Generate a strong password locally
UUID Generator
Generate random v4 UUIDs in bulk

See it in action

Url Slug Generator
to slugify strings

Before

Aaron James
Christopher Neal

After

aaron-james
christopher-neal
Open tool →
Case Converter
converts between 8 text case styles

Before

hello world example

After

helloWorldExample
Open tool →
Runs in your browser

Every tool executes locally. Nothing you type or upload is sent to a server.

No sign-up

No account, no email, no waiting. Open a tool and use it.

Always free

No paywalls or premium tiers — every tool is fully usable for free.

by stafura.dev
Privacy PolicyContact
🔒 Client-Side Only
🚀 Fast Processing
💾 No Data Stored
Last updated: August 1, 2026