Tool
Base64 / URL Encoder
Base64 / URL Encoder
Encode and decode Base64, Base64URL, and URL-encoded strings with a clean, reliable workflow. Designed for QA, ops, and engineering teams who need to inspect payloads, troubleshoot tokens, or normalize URLs quickly. Paste input, pick a mode, and get an instant output you can copy or reuse—entirely in-browser.
Encode or decode Base64 and URL strings with instant output.
Base64 & URL Encoder
Encode or decode Base64, Base64URL, and URL strings in one place.How it works
The Base64 / URL Encoder handles Base64, Base64URL, and URL-encoded strings in one place so you can translate payloads without scripting.
Use it to decode tokens or URLs, normalize encoding, and verify payloads quickly.
What you can do with it
- Supports Base64, Base64URL, and URL encoding in one tool.
- Handles Unicode safely with UTF-8 encoding.
- Includes quality-of-life options like whitespace trimming.
Common tasks
- Decode payloads from logs or headers.
- Prepare URL-safe strings for tracking links.
- Verify Base64URL tokens from SDKs or APIs.
Quick steps
- Paste your input in the left panel.
- Select the encoding/decoding mode.
- Copy or reuse the output on the right.
Related tools
More tools in the format category.
- JSON Beautifier — Instantly beautify, indent, and format raw JSON into a clean, readable structure with syntax highlighting. Ideal for analysts, QA teams, and operations staff, this tool makes it easy to inspect API responses, debug payloads, or review configuration files. Simply paste or upload your JSON and get a consistently formatted output that’s easy to scan and understand. It supports large files, works entirely in-browser, and requires no signup or tracking. Whether you’re working with REST APIs, server logs, or event data, this tool streamlines your workflow and helps you catch issues faster with clear, structured JSON output.
- XML Beautifier — Clean up and format raw XML with proper indentation and tag structure for improved readability and easier debugging. This tool is ideal for QA teams and engineers working with XML-based APIs, RSS feeds, or backend service responses. Simply paste your unformatted XML, and the tool will automatically reformat it into a well-structured, easy-to-read layout. It highlights nested tags, preserves attributes, and ensures consistent spacing, making complex XML much easier to navigate. Everything runs client-side to ensure data privacy. Whether you're troubleshooting video tags or reviewing integration payloads, this formatter saves time and reduces parsing errors.
Before you start
- Paste a string to encode or decode.
- Use examples to validate the workflow.
What you get
- Decoded or encoded result ready to copy.
- Byte size counters for input and output.
Common pitfalls
- Invalid Base64 padding will cause errors.
- URL decoding can fail if the string is malformed.
Tips for best results
- Paste raw input so the tool can apply formatting consistently.
- If output looks wrong, validate the input for missing commas or tags.
- Use the example buttons above to sanity-check formatting and behavior.
Accuracy & limitations
- Outputs are deterministic and based only on the input you provide.
- When official specs exist, the tool favors strict parsing over guesses.
- URL-based tools can vary by region, cache, or upstream availability.
- Always validate critical outputs in your production systems before launch.
Trust & quality
- Strict parsers reject invalid input rather than guessing.
- Outputs are deterministic and preserve data structure.
Who it is for
- QA and support teams validating outputs before launch.
- Analysts and operators who need fast clarity on raw data.
- Engineers and technical writers documenting system behavior.
When to use this tool
- You need a quick answer without scripting or a full IDE.
- You want a repeatable, shareable output for teammates.
- You are troubleshooting inconsistent or malformed input.
Quick checklist
- Input is complete and copied in full.
- Output matches expectations and no errors are shown.
- Share or export the result if you need to keep a record.
Frequently asked questions
Is it free to use?
Yes. Core tools are free and accessible without signup.
Does it upload my data?
This tool runs locally in your browser. Data you paste or files you upload stay on your device and are not uploaded.
What if I spot a bug?
Please reach out via the Contact page with a reproduction example.
What is Base64URL?
A URL-safe Base64 variant that replaces +/ with -_ and removes padding.
Why does decoding fail?
Input may be truncated or contain invalid characters or padding.
Is my data uploaded?
No. Encoding runs locally in your browser.
Helpful links
Standards & references
Official specs that inform how this tool interprets data.