Developers deal with messy data formats every day. Three small free tools — a JSON formatter, a Base64 encoder/decoder, and a URL encoder — handle the most common chores without installing anything.
Format and Validate Messy JSON
APIs and log files often return JSON as one long unreadable line. A JSON formatter “pretty-prints” it with proper indentation, and flags syntax errors if the data is broken.
Worked example: You copy {"name":"Ali","age":29} from an API response, paste it into the formatter, and instantly get clean indented JSON you can actually read. If you accidentally deleted a comma or bracket, the tool tells you exactly where the problem is instead of leaving you to hunt for it.
Decode and Encode Base64
Base64 is a way to represent binary data as plain text — you will see it in email attachments, API tokens, and embedded images. A decoder turns it back into readable text; an encoder does the reverse.
Worked example: You receive the string SGVsbG8sIFdvcmxkIQ== in a log file and have no idea what it says. Paste it into the Base64 decoder: it reads “Hello, World!”. Mystery solved in two seconds.
URL-Encode Special Characters
Web addresses can only contain certain characters. Spaces, accents, and symbols in file names or search queries must be converted to percent-encoded form, or links break.
Worked example: You want to share a file named café menu.pdf. Paste it into the URL encoder and you get caf%C3%A9%20menu.pdf — the é becomes %C3%A9 and the space becomes %20. That encoded version works reliably in any link, email, or API call.
Try it free: JSON Formatter, Base64 Encoder/Decoder, and URL Encoder/Decoder.