NavShelf · Free online tools
Small tools that just work.
Fast, privacy-friendly utilities for developers and everyday use. Every tool runs entirely in your browser — nothing is uploaded to a server.
Base64 Encoder / Decoder
Convert text to Base64 and back, with UTF-8 support.
LiveURL Encoder / Decoder
Percent-encode query parameters and decode %XX sequences.
LiveJSON Formatter
Format, validate and minify JSON.
LiveUnix Timestamp Converter
Convert epoch timestamps to readable dates.
LiveAsset Growth Calculator
Project savings and compound returns year by year.
"tool.loan.title": "Loan & Mortgage Calculator", "tool.loan.desc": "Monthly payment, total interest and amortization schedule.", "tool.savings.title": "Savings Goal Calculator", "tool.savings.desc": "How much to save each month, or how long it will take.", LiveLoan & Mortgage Calculator
Monthly payment, total interest and amortization schedule.
LiveSavings Goal Calculator
How much to save each month, or how long it will take.
AppNavShelf
A file-manager style bookmark manager. Data stays in your browser.
Why these tools
Most online utilities make you wait for ads, upload your data, or create an account. These tools are plain HTML and JavaScript: they load instantly, work offline, and never send your input anywhere.
Same for the blog: practical guides on organizing bookmarks and getting more out of your browser.