Truly private
Everything runs in your browser. Your salary, your tips, your files — nothing is ever uploaded to a server.
100% client-side · your data never leaves your browser
Tools that actually
do the math.
Premium calculators and converters built for the 2025/2026 rules generic tools get wrong — tax, nutrition, salary, AI cost, image conversion. No sign-up. No upload. Instant.
Overtime deduction
$5,000
premium portion · within cap
Est. tax saved
$600
at 12% marginal rate
Built on verified, primary-source rules
IRS-verified·OBBBA 2025–2028·Mifflin-St Jeor·FY 2025-26 slabs·WCAG-ready
Why people trust the number
Every tool pairs the calculator with the methodology, a worked example, and the sources — so you understand the answer, not just see it.
Instant & offline
No spinners, no round-trips. Tools load fast and keep working even when your connection drops.
Verified rules
Tax logic checked against live IRS guidance; nutrition on Mifflin-St Jeor. Sources cited on every page.
Shows its work
Full breakdowns and worked examples mean you can audit every figure line by line.
Zero cost, no paywall
Free forever, no account, no paywall on the math. Just the tool you came for.
Accessible & responsive
Keyboard-friendly, screen-reader labelled, and beautiful from phone to desktop.
Three steps. No friction.
From question to answer in seconds — nothing to install, nothing to sign.
01
Pick a tool
Tax, salary, nutrition, AI cost, image conversion — choose what you need from the library.
02
Enter your inputs
Type a few numbers or drop a file. It stays on your device — computed locally, instantly.
03
Get the breakdown
See the result plus the full methodology, worked example, and sources behind it.
The toolkit
Ten focused tools, each one the best at its single job.
Most popular
Open tool OBBBA Savings Suite
Tips + overtime + car-loan + senior deductions combined into one take-home impact for 2025.
GLP-1 Protein Calc
Muscle-preserving targets on Ozempic / Wegovy.
JPEG XL Converter
JXL ⇄ JPG / PNG, fully in-browser.
LLM Cost Calculator
Token counts & price compare across models.
India Salary Calc
In-hand pay, new regime FY 2025-26.
NYT Connections Helper
Grouping workspace + graduated hints, no spoilers.
llms.txt Generator
Build & validate a spec-compliant file.
View all tools →10
focused tools
0
bytes uploaded
<1s
to first result
$0
forever
Loved for getting it right
"Finally a tax tool that knows only the premium half of overtime is deductible. Most calculators get this completely wrong."
"Converted a folder of JXL screenshots to PNG without uploading anything. Fast and private — exactly what I needed."
"The GLP-1 protein target kept me from losing muscle. Clear methodology, no fluff, no account required."
Illustrative testimonials — replace with real, verifiable quotes before launch.
Stop guessing. Start calculating.
No sign-up, no upload, no cost. Open a tool and get a number you can actually trust.
Browse the toolkitQuestions, answered
Is my data really private?
Yes. Every calculation runs entirely in your browser with JavaScript and WebAssembly. Your inputs and files are never sent to any server.
Do I need an account?
No sign-up, no email, no login. Open any tool and use it immediately.
Are the tax numbers official advice?
They're educational estimates built on verified IRS guidance, not tax advice. Always confirm with a professional or primary source before filing.
How much does it cost?
Nothing. Every tool is free, with no paywall on the calculation itself.