Browser-based micro tools for modern knowledge workers — work calculators, generators, converters and utilities. Everything runs in your browser; no data ever leaves it.
Format JSON with indentation and syntax highlighting. Detects errors and validates.
Convert Unix timestamps to dates and Slack date syntax. Live current timestamp.
Convert rem ↔ px instantly. Supports custom root font size.
Convert em ↔ px instantly. Supports custom parent font size.
Convert vw ↔ px instantly. Includes responsive viewport width presets.
Convert CSS % ↔ px instantly. Supports custom parent width.
Convert ms ↔ s instantly. Useful for CSS animations and transitions.
Edit linear, radial and conic gradients visually and copy the CSS instantly.
Generate an 11-shade Tailwind palette (50–950) from one base HEX and copy the code.
Compare how an Open Graph image, title, and description appear across major platforms.
Live counts of characters, words, sentences and lines. With social limits.
Estimate monthly & yearly take-home pay from gross salary after Korea's insurances and taxes, with a full breakdown.
Target vs. remaining hours and the daily average you need under flex work. Leave & holidays included.
Add and subtract time blocks to total up work hours. Built for timesheets and billing.
Convert hours, days, weeks and months instantly. Switch between calendar and work basis.
Convert Gregorian dates to Korean lunar dates and back. Covers 1901–2100 with leap months.
Instantly calculate growth rate, % change, and MoM/YoY/QoQ/WoW from two values.
Calculate the relative percent difference between values A and B.
Calculate the growth rate needed to reach your target from your current value.
Calculate the required increase, growth rate, and progress to your goal.
Calculate the original value from a final value and a known growth rate.
Calculate CAGR (Compound Annual Growth Rate) from start, end, and years.
Compute compounded final value and future projection from a value, rate, and periods.
Compare campaign time progress vs budget burn rate to spot overpacing or underpacing instantly.
Calculate ROAS from ad spend and revenue. Reverse-calculate target revenue or allowable budget.
Calculate CPA from ad spend and conversions. Reverse-calculate expected conversions or required budget.
Calculate CPC from ad spend and clicks. Reverse-calculate expected clicks or required budget.
Calculate CPM from ad spend and impressions. Reverse-calculate expected impressions or required budget.
Calculate CTR from clicks and impressions. Reverse-calculate required clicks or required impressions.
Analyze stage-by-stage conversion and drop-off rates for your funnel, then reverse-calculate required traffic.
Create a QR code from a URL, customize its shape and color, and download PNG or SVG.
Paste or upload a QR image, or scan it with your camera to view its link or text.
Upload several PDFs, arrange the order, and combine them into one PDF.
Split a PDF into every page or into custom page ranges as new PDFs.
Rotate an entire PDF or only selected pages by 90 degrees and save a new PDF.
Pick the pages you do not need and build a new PDF without them.
Kitfolio is a collection of browser-based tools that help PMs, designers, developers, marketers, job seekers, office workers, and small business owners quickly solve the small, repetitive problems they run into during the workday. Counting characters, formatting JSON, calculating take-home pay, generating a QR code, merging PDFs — tasks you need often but would rather not search for every time are gathered in one place. There's nothing to install and no account to create; open the page and start using it.
Every Kitfolio tool runs inside your browser, not on a server. The text, numbers, and files you enter are never transmitted anywhere — all calculation and conversion happens on your device. That means you can work with sensitive documents and data without worrying about them leaving your machine, and the tools stay fast even on a slow connection.
Type what you're trying to do into the search box at the top, or narrow the list by role to jump straight to the tool you need. Each tool page includes clear how-it-works steps and a set of frequently asked questions, so even a tool you've never used is easy to pick up. Kitfolio isn't one giant app — it's a growing library of small, focused, practical tools, each with a clear purpose.