Free tools for founders.

Estimate your build budget in seconds

Turn a feature list into a realistic timeline

Model MRR across pricing tiers

See exact Stripe processing fees

Validate unit economics and payback

Know your margins instantly

Find your minimum viable volume

Measure every investment's return

Apply or reverse any discount

Three percentage modes in one

Add or extract tax in seconds

Split bills without the math

Know your monthly repayment upfront

See compound growth over time

Plan your home purchase payment

Countdown to your savings target

Price your time correctly

Quote with a scope buffer built in

From cost to price in one step

Which pack is the better deal?

Track customers kept and lost

Switch monthly and annual revenue

Turn traffic into a clear percentage

Check if ad spend pays off

Decode core media metrics

See how long your cash lasts

Calculate real average burn

One number for growth efficiency

Value each customer relationship

Time to earn back acquisition cost

Are you making or losing money?

The ROAS you need to profit

Value of each transaction

Revenue into profit before overhead

Investor benchmark for SaaS health

Build a palette from one brand color

Build a harmonious type hierarchy

Make a text favicon, download PNGs

Generate SEO and Open Graph tags

Generate schema markup for rich results

Create crawler directives fast

Slugs, UUIDs, API keys, random strings

Linear and radial CSS gradients

Craft CSS box shadows visually

Style CSS text shadows

Per-corner radius with preview

Build easing curves visually

Generate CSS @keyframes

Visual CSS flexbox playground

Build grid layouts fast

Frosted-glass backdrop CSS

Design a button, copy the CSS

Stack CSS filter effects

50-900 shades from one colour

Tailwind-style colour object

Generate SVG wave dividers

Random organic SVG blobs

Secure passwords with strength scoring

Placeholder text on demand

Encoded campaign tracking URLs

Combine rules for any stack

Scaffold a Markdown README

Apache rules made simple

The right viewport meta tag

Bulk random UUIDs

SHA-1 to SHA-512 digests

Custom SVG placeholders

URL list to XML sitemap

Curated heading and body pairs

HEX, RGB, and HSL instantly

px, rem, em, and pt

Encode or decode, Unicode-safe

Percent-encode URL components

Seven cases at once

Binary, octal, decimal, hex

Celsius, Fahrenheit, Kelvin

Metric and imperial lengths

mg, g, kg, oz, lb, stone

Bytes to terabytes, 1024-based

Unix time to human dates

Convert between IANA timezones

Integers and Roman numerals

Simplified ratios and locked sizes

Seconds, minutes, hours, H:M:S

Validate WCAG 2.1 contrast ratios

Verify pre-launch readiness items

Preview social share cards

See the active breakpoint live

Viewport, DPR, and orientation

Decode JWT header and payload

Validate a list of emails

Break a URL into parts

Flesch reading ease score

Prettify, validate, minify JSON

Test regex in real time

Compare two texts line by line

Words, characters, reading time

Trim and normalize messy text

Convert Markdown with preview

CSV table to JSON array

JSON array to CSV

Remove repeated lines

Sort, reverse, or shuffle lines

Search and replace with regex