Guides
Short explanations that go with the tools. Not a news blog — each guide answers one search intent and links to the relevant free utility.
QR Codes
How to Create a QR Code
Encode the data you want a phone to read, download a file, scan it once yourself, then print or share that file. The pattern is the data — it does not call a server later unless you encoded a URL that does.
How to Create a Wi-Fi QR Code
A Wi-Fi QR code stores the network name, security type and password in a standard WIFI: payload. Scanning it lets a phone join without typing the password. It is a credential slip, not a live login to your router.
Do QR Codes Expire?
A static QR code does not expire. The pattern still decodes to the same characters years later. What fails is whatever those characters point at — a taken-down page, a changed Wi-Fi password, or a short link whose host cancelled the redirect.
Static vs Dynamic QR Codes
A static QR code stores the payload in the image. A dynamic QR code usually stores a short URL that redirects to the real destination so you can change the target later. MultiConvers only creates static codes.
QR Code PNG vs SVG
Download PNG when you need a ready-made pixel image at a known size. Download SVG when the same code must stay sharp on a poster or in a design file. The format does not change what the code encodes.
Passwords & Security
How to Create a Strong Password
Use a unique, randomly generated password for each site, store it in a password manager, and prefer length over a clever substitution on a short word.
How Long Should a Password Be?
For a random generated password, 16 characters is a practical default. Longer is stronger if a manager stores it. Site minimums of 8 characters are a floor, not a target.
Password Length vs Complexity
On a random password, adding characters usually beats adding a punctuation rule to a short string. Complexity rules still help when they stop you from using a dictionary word.
Developer Tools
How to Format JSON
Formatting JSON means parsing it, then reprinting the same value with consistent indentation. Invalid text cannot be formatted — fix the syntax first.
How to Validate JSON
Valid JSON is text that JSON.parse accepts. Validation does not pretty-print or minify; it only reports whether the document is legal JSON.
JSON Pretty Print
Pretty-print reprints valid JSON with indentation so a person can read it. Minify reprints the same value as one line. Neither changes what the document means.
What Is Base64?
Base64 is a way to write binary data using 64 ASCII characters. It is encoding, not encryption. Anyone who sees the string can decode it.
How to Encode Base64
Convert text to UTF-8 bytes, then to Base64. The result is longer ASCII, not a secret. Unicode and emoji need the UTF-8 step or they will be corrupted.
How to Decode Base64
Decoding reverses Base64 back to bytes, then to text with UTF-8. Invalid characters should fail loudly. Success does not mean the original message was secret.
What Is URL Encoding?
URL encoding (percent-encoding) replaces characters that are unsafe in a URL with % and two hex digits. A space becomes %20. It keeps a query value from being read as another parameter.