Developer utilities

Format, validate, encode, and decode small developer data snippets.

These tools handle common JSON, Base64, and URL cleanup tasks directly in the browser. They are built for pasted snippets, API examples, configuration fragments, and quick checks before moving data back into your editor, docs, or debugging workflow.

JSON tools

Format and check pasted JSON

Start with JSON formatter

JSON formatter

Open

Format, indent, and optionally sort JSON object keys locally in your browser.

JSON validator

Open

Validate JSON syntax locally in your browser, show parse errors, and report the top-level type without uploading pasted JSON.

JSON minifier

Open

Minify JSON locally in your browser, compact JSON into one line, and remove unnecessary whitespace without uploading it.

Encoding tools

Decode and encode URL or Base64 text

Open Base64 decoder

Base64 decode

Open

Decode Base64 text to readable Unicode text locally in your browser.

Base64 encode

Open

Encode plain text and Unicode text to Base64 without uploading it.

URL decode

Open

Decode URLs, query strings, and percent-encoded URL components locally in your browser.

URL encode

Open

Percent-encode URL text, query values, and URL components in your browser.

Snippet-sized by design

Use these pages for pasted text snippets. Very large files, binary payloads, and production secrets should stay in approved local or internal tools.

Clear limits

Base64 is an encoding format, not encryption. URL encoding changes reserved characters, but it does not prove a link is safe.

Reviewed pages

Each released tool has visible examples, limitations, related tools, and structured data that describes the page content users can see.

How these developer utilities fit together

Start with JSON formatting when an API response or config value is hard to read. Use JSON validator online when you need to validate JSON syntax and check parse errors, or compact JSON minifier when minified one-line output is easier to paste into another tool.

For encoded text, use URL decode and URL encode for percent-encoded query values or URL components. Use Base64 decode and Base64 encode for text payloads that need Base64 or Base64URL conversion.