Add the source content
Paste code or technical input, upload a supported plain text file, or load the working example. Check headers, delimiters, syntax, or line structure before processing.
Developer tools
URL Encoder and Decoder
Result
The result will appear here after you run the tool.
Press Ctrl or Command and Enter to run the tool.
About this tool
About this tool
URL Encoder Decoder converts between raw text and percent-encoded forms by applying encodeURIComponent logic and decoding sequences in your browser. It handles query components and full URL strings locally.
Encode or decode URL components safely. Use the full-width workspace to decode content while reviewing syntax, encodings, protocol fields, and implementation details. The tool accepts plain text, provides focused options, and creates plain text output that you can inspect, copy, download, or save as a local draft.
Built for daily work
How to use this tool
How to use this tool
Configure the operation
Review Mode. The selected controls determine how the URL Encoder and Decoder interprets the source and builds the result.
Run the tool
Start the URL Encoder and Decoder and review the result, visual preview, and technical report. Correct any reported issue and run the tool again when necessary.
Export or continue the workflow
Copy or download the plain text result, save a browser-local draft, or open a related tool for the next conversion, validation, or cleanup step.
Key features
Key features
Percent-encode and decode full URLs or query parts
Encode spaces as %20 or +, escape reserved characters, and decode percent-encoded strings back to readable text.
Component-aware encoding
Paste a full URL and encode only the query and fragment, or encode a standalone value without double-encoding the separators.
Copy and download in either direction
Copy or download the encoded URL or the decoded string for use in code, documentation, or API testing.
No URL parsing or validation
The tool encodes and decodes characters. It does not check scheme validity, resolve domains, or follow redirects.
Practical use cases
Practical use cases
Private by default
For local tools, input is processed in your browser and is not sent to application analytics.
Data processing noticeTechnical details
Technical details
Input formatsplain text
Output formatsplain text
ProcessingLocal browser processing
Task controlsMode
Maximum local file25 MB per supported file
Workspace featuresFocus mode, examples, copy, download, local drafts, and result reports
Limitations and important notes
Limitations and important notes
- Decoding is not the same as verifying authenticity or trustworthiness.
- Large or deeply structured input depends on available browser memory and may process more slowly on mobile devices.
- The tool implements practical browser-based processing and may not reproduce every feature of specialist desktop software or every vendor-specific extension.
- Keep the original source and review generated output before production, security-sensitive, financial, legal, or safety-critical use.
Frequently asked questions
Frequently asked questions
It converts between raw text and percent-encoded forms by applying encodeURIComponent logic and decoding sequences in your browser.
You can encode full URLs or individual query components; review options for space handling as plus or percent 20.
Yes. Unicode characters are UTF-8 encoded before percent-escaping, with decoding reversing the process locally.
Yes. Encoding and decoding run entirely in your browser.
Related guides and solutions
Related guides and solutions
URL-encode a query string safely
Spaces, ampersands, and non-ASCII characters break URLs unless they are encoded. The [URL encoder and decoder](tool:url-encoder-decoder) converts any string into a safe percent-encoded form and decodes it back, all locally.
Learn moreHow to inspect a JSON API response before integration
A structured API response review process for developers, QA teams, technical writers, and integration engineers.
Learn moreHow to review HTTP security headers
A practical header-review checklist covering content restrictions, framing, MIME handling, transport, referrers, permissions, CORS, cookies, and caching.
Learn moreRelated tools
Related tools
Developer tools
Hash Generator
Create SHA-1, SHA-256, SHA-384, and SHA-512 hashes in the browser.
Open toolDeveloper tools
HMAC Generator
Generate an HMAC from a message, secret key, and selected algorithm.
Open toolDeveloper tools
Base64 Encoder and Decoder
Encode text as Base64 or decode Base64 back to text.
Open tool