Launchpad
A small, focused collection of free online tools — plus the articles that explain what each one does and when to reach for it.
JSON Formatter
Developer Tools
Format, validate, and prettify JSON data. Paste raw JSON to instantly see a clean, indented output with error highlighting.
Word Count
Developer Tools
Live word, character, sentence, and paragraph counter. Paste or type any text to instantly see detailed statistics.
Tic-Tac-Toe
Games
Classic two-player Tic-Tac-Toe. X vs O — first to line up three wins. Detects wins, draws, and lets you reset anytime.
FIRE Calculator
Finance
Calculate your FIRE number and retirement date. Adjust sliders for assets, savings, expenses, and return rate to instantly see your target, retirement age, and year-by-year projection.
Base64 Encoder/Decoder
Developer Tools
Encode text to Base64 or decode Base64 back to text. Supports standard and URL-safe Base64 with instant conversion.
What you’ll find here
Songtov Utility is a curated set of developer and productivity tools that run entirely in your browser. There are no accounts to create, no uploads to services you have not heard of, and no dark-pattern paywalls. Paste your data, do the thing, close the tab.
Every tool is paired with a long-form article that covers the concept behind it — what JSON actually is, how Base64 encoding really works, why the 4% rule is the foundation of early retirement math, how different word-count tools disagree with each other. The goal is that you leave understanding the topic, not just having used a widget.
Three principles guide what ships here:
- Client-side only. Your data never leaves your browser. That applies to JSON payloads, encoded strings, financial inputs, and every text snippet you paste.
- Fast and minimal. No sign-ups, no modals begging for your email, no typescript-heavy single-page apps that take three seconds to render a text field.
- Documented properly. Every tool has a written guide next to it. If you arrived from a search engine, you should be able to learn the thing, use the tool, and leave — in that order.
Browse the tools above or jump straight to the blog to read about the topics they cover. If a tool is missing and you think it would fit, the contact page has an email address.
Latest from the Blog
View all posts →Base64 Encoding Explained: How It Works and When to Use It
A practical guide to Base64 encoding — how the algorithm works, why it exists, when you should and should not use it, and how to avoid the most common pitfalls.
FinanceWhat Is Your FIRE Number? How to Calculate Financial Independence
Learn how to calculate your FIRE number using the 4% rule, how savings rate and return rate affect your retirement timeline, and how to use a FIRE calculator.
Developer ToolsHow to Format and Validate JSON: A Complete Guide
Learn everything about JSON formatting and validation — from the basics of JSON syntax to common errors and how to fix them.