Notes from Tonle
Longer pieces, on the things worth writing down.
Essays about money, the small calculations that quietly shape big decisions, and the tools we build around them. Published when there is something to say.
Latest
How to Compress Images Online: A Complete Guide to Reducing File Size Without Losing Quality
Learn how to compress images online for faster websites, smaller email attachments, and more storage space — all without sacrificing visual quality.
Utility9 minRead the essay
Earlier
2026
Free Online Image Resizer: A Practical Guide to Quickly Resize Images with Tonle.app
ToolsUltimate Guide to Free Online Tools on Tonle.app
guidesFree Online Mortgage Calculator: How to Estimate Payments, Interest, and Amortization
FinanceThe Ultimate Guide to Tonle.app’s Free Online Unit Converter
ToolsHow to Calculate Discounts: A Complete Guide to Percentage Off, Buy One Get One, and Stacked Savings
FinanceHow to Calculate a Tip: The Complete Guide to Tipping Etiquette, Math, and Smart Splitting
Finance
Looking for something more reference-shaped? The guides library covers the same topics in a different format: organized by category, paired with the relevant calculator, written to be returned to.