JSON Formatter & Validator
Validate, pretty-print, and minify JSON payloads safely using native JSON.parse and JSON.stringify with detailed syntax error reporting.
URL Encoder & Decoder
RFC 3986Percent-encode and decode URL components or full URIs safely with support for query string `+` spaces and malformed URI error handling.
Optional Below-Tool Ad Placement (Disabled by Default)
How to Use URL Encoder & Decoder
- 1Paste your URL parameter, query string, or full web address into the input field.
- 2Select 'Component (`encodeURIComponent`)' for query parameter values or 'Full URI (`encodeURI`)' to preserve `:`, `/`, `?`, and `&`.
- 3Click 'Encode URL' or 'Decode URL' to transform the string immediately.
- 4Copy the encoded/decoded result to your clipboard.
Key Features & Privacy
- ✦Supports both strict RFC 3986 component encoding (escaping `!`, `'`, `(`, `)`, `*`) and full URI encoding.
- ✦Optional toggle to treat `+` signs as spaces when decoding `application/x-www-form-urlencoded` query strings.
- ✦Gracefully catches `URIError: URI malformed` exceptions when decoding incomplete `%` sequences and explains the exact issue.
- ✦One-click copy and input/output swap.
Frequently Asked Questions
When should I use Component mode vs Full URI mode?
Use Component mode when encoding a value that goes inside a query parameter (so `&` and `=` are escaped as `%26` and `%3D`). Use Full URI mode when encoding an entire link while keeping the protocol and path slashes intact.
Why did decoding throw a Malformed URI error?
A lone `%` symbol not followed by two valid hexadecimal digits (like `%20`) is invalid percent-encoding. Fix or remove the stray `%` to decode.
Optional Before-Related-Tools Ad Placement (Disabled by Default)
Related Developer Tools
Explore more 100% browser-based utilities in this category.
Base64 Encoder & Decoder
Encode plain text (including full UTF-8 Unicode and emojis) to Base64 or decode Base64 strings back to readable text with error validation.
HTML Minifier
Minify HTML code conservatively by stripping safe comments and collapsing inter-tag whitespace while preserving <pre>, <textarea>, <script>, and <style> blocks.
CSS Minifier
Compress CSS stylesheets using a string-aware tokenizer that removes comments and redundant whitespace without breaking calc(), strings, or data URIs.