⚡4 Tools · Free Forever · No Sign-up

Simple Tools
That Actually
Work.

A handpicked suite of fast, focused utilities. Freelance tax estimates, QR codes, time zones, PDF compression — no bloat, no sign-up, no data leaving your browser.

All Tools
4 utilities
Finance · US Only
💰
Freelance Tax Calculator
Know your real take-home pay as a US freelancer. Uses actual 2024 federal tax brackets, self-employment tax (15.3%), state tax, QBI deductions, and quarterly payment estimates.
2024 US tax brackets SE tax (15.3%) Quarterly estimates All filing statuses
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QR Code
⬛
QR Code Generator
Generate QR codes for URLs, WiFi, email or phone in seconds. Custom colors, instant PNG download. No watermarks, ever.
5 content types Custom colors PNG & SVG
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Productivity
🌐
Time Zone Converter
Convert times between 44 world cities instantly. Live ticking clocks, DST-aware, perfect for remote teams.
44 cities Live clocks Add/remove cities
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Files
📄
PDF Compressor
Shrink PDF files entirely in your browser. Nothing is ever uploaded to any server — your documents stay 100% private.
100% private No upload ever 3 quality levels
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4+
Free Tools
0kb
Data Uploaded
100%
Browser-Side
$0
Cost to Use
Why ToolStack

Built different.
On purpose.

01
Zero Data Leaves Your Device
Every tool runs entirely in your browser. No servers, no uploads, no analytics tracking your files.
02
No Account. Ever.
No sign-up walls, no email capture, no "free trial" nonsense. Open a tool, use it, close it.
03
One Tool, Done Right
Each tool does exactly one thing exceptionally well. No upsells, no feature bloat, no dark patterns.
💼 Self-Employment Tax Calculator

Know Your
Real Take-Home

Estimate federal tax, self-employment tax, and quarterly payments. Built for US freelancers, consultants, and contractors.

Income
$
$
0%13.3%
Deductions
SE Tax Deduction
Deduct 50% of SE tax
Standard Deduction
$14,600 single / $29,200 MFJ
QBI Deduction (199A)
20% pass-through deduction
$
Quick Presets
Tax Breakdown
Annual Take-Home
$0
after all taxes & deductions
Eff. rate: 0%
Gross Income$0
Business Expenses−$0
Net SE Income$0
Total Deductions−$0
Taxable Income$0
Federal Tax−$0
SE Tax (15.3%)−$0
State Tax−$0
💰 Net Take-Home$0
📅 Quarterly Payments
Q1 — Apr 15
$0
Q2 — Jun 15
$0
Q3 — Sep 15
$0
Q4 — Jan 15
$0
⚠️ Estimate only. Tax laws change. Consult a CPA for advice specific to your situation.
QR Code Generator

Generate QR CodesIn Seconds.

URL, text, email, phone — any content. Custom colors, instant download.

Input
Foreground
Background
Size: 256px
Error Correction
—
Characters
—
Type
—
Size
Output

Fill in your content
and hit Generate

Live
⏱ Time Zone Converter

World Time,
Instantly.

Convert time between any two time zones. Perfect for remote teams and scheduling calls.

Source Time
—
—
—
Difference
Converted Time
—
—
🌍 World Clocks

Add a City

📄 PDF Compressor

Smaller PDFs,
Instantly.

Compress PDF files right in your browser. No uploads, no servers. Your files never leave your device.

📎
Drop your PDF here
or click to browse files
📱
Screen
72 DPI · Smallest
Recommended
⚖️
Balanced
150 DPI · Good quality
🖨️
Print
300 DPI · High quality
📄
file.pdf
0 KB
Analyzing...0%
✅
Compression Complete!
Done
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Original
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Compressed
0%
Saved
Original
Compressed