How to use free online tools
Plain-English guides to the tasks people reach for most — what each one does, when you need it, and the free, in-browser tool that gets it done.
A Practical Guide to Everyday Developer Encoding & Formatting
How and when to use Base64, JSON formatting, hashing, JWTs, regex and cron — with free in-browser tools for each task.
11 min readHow to Edit Images in the Browser Without Uploading Them
Compress, watermark and strip metadata from photos entirely on your device — why client-side image editing is faster and more private.
8 min readGenerating What You Need: QR Codes, Passwords, IDs & Files
A practical guide to generating QR codes, strong passwords, UUIDs, barcodes and PDFs — all free and fully in your browser.
8 min readEveryday Calculations & Conversions Made Simple
Convert units and time zones, and calculate age, BMI, discounts and loan EMIs — a plain-English guide with free in-browser tools.
7 min readWorking With Text: Case, Diffs, Fonts & Translation
Change case, compare versions, generate fancy fonts, summarize and translate text — a guide to fast, private text tools.
6 min readUnderstanding Your IP Address & Network Basics
What your public IP reveals, how to check it, and what latency means — explained simply, with a free in-browser network tester.
6 min readWhy In-Browser Tools Are More Private Than Uploading Files
What actually happens when you upload a file to an online converter, and why client-side tools remove that risk entirely.
7 min readPNG, JPEG, WebP or SVG: How to Choose an Image Format
A practical guide to picking the right image format — what each one is good at, where each falls down, and how to decide quickly.
6 min readCharacter Encoding Explained: ASCII, Unicode and UTF-8
Why text turns into question marks and mojibake, what Unicode actually is, and how UTF-8 fixed a decades-old mess.
5 min readWhen a CSV Is Too Big for a Spreadsheet
Why spreadsheets fail on large files, what SQL and columnar formats do differently, and how to explore a big CSV without a database server.
6 min read