JSON formatting: validate first, then organize
Make API responses, configuration snippets and JSON logs readable, and distinguish syntax errors from incorrect data.
Open tool →Tool guides
Steps, worked examples, troubleshooting and limitations for six tools that run in your browser.
Choose a tool
Image to Base64: when to use a Data URL
Convert small images into text for HTML or CSS, and decide when a separate image file is a better choice.
Open tool →Base64 encoding: text, bytes and UTF-8
Use repeatable examples to understand text encoding without confusing Base64 with encryption or a binary file viewer.
Open tool →URL encoding: full addresses versus parameter values
Handle spaces, Unicode and reserved characters without encoding twice or turning a URL's structure into parameter content.
Open tool →Timestamp conversion: units, time zones and repeatable results
Distinguish seconds from milliseconds and understand UTC and local representations of the same instant.
Open tool →Text counting and cleanup: define what you are counting
Compare characters, words and paragraphs, and keep an original copy before removing duplicate lines or whitespace.
Open tool →Formatting JSON is only the first check
Use duplicate keys, large integers and field types to see what still needs checking after JSON passes syntax validation.