Encoding & crypto
Base64 encode / decode
Encode text to Base64 or decode Base64 back to readable UTF-8 text.
Base64 represents binary data as ASCII-safe text so it can travel through JSON, URLs, and email bodies. Use encode for payloads you need to embed as text; use decode when debugging API responses or config. For images, see Image to Base64 on this hub.
Similar tools
Quick links to related utilities—same workflow, different input or output.
- Encoding & cryptoJWT parserDecode JWT header and payload (Base64URL JSON)—signatures are not verified.Open
- Encoding & cryptoHash generatorCompute SHA-256, SHA-384, or SHA-512 digests of UTF-8 text in hex.Open
- Images & mediaImage to Base64Encode a local image file as a Base64 data URL for embedding in HTML or CSS.Open
FAQs
What is Base64 used for?›
It encodes bytes as a printable string so binary data can ride inside text-only channels—HTTP JSON fields, data URLs, and similar formats.
Is Base64 encryption?›
No. Anyone can decode Base64; it is not secrecy. Do not rely on it to protect sensitive data.
Why does decode fail?›
The input must be valid Base64. Extra whitespace is ignored. If the decoded bytes are not valid UTF-8 text, treat the result as binary.
How does this relate to JavaScript btoa/atob?›
Conceptually the same: encode to an ASCII string and decode back. This tool focuses on UTF-8 text for readability.
Can I decode API tokens safely here?›
Decoding reveals payload contents. Do not paste production secrets on shared machines; prefer local tools for classified material.
General
Do these tools send my data to Exemplar’s servers?›
By default, conversion and formatting run entirely in your browser. Nothing is uploaded to Exemplar for normal paste-and-transform workflows. Tools that deliberately open an external service (for example, a third-party speed test) are called out on the page.
Do I need an account or install anything?›
No account is required. Everything runs in the browser—there is nothing to install for these utilities. They complement the Exemplar platform but work standalone.
Are these utilities open-source or the same as other sites?›
These pages are built for Exemplar’s audience (developers working with APIs, config, and ops data). Behavior may differ slightly from other online tools; always verify critical output in your own environment.
Are there size or performance limits?›
Very large inputs can slow down or crash the tab—especially for images, huge JSON, or multi‑MB HAR files. For production-scale data, prefer local CLI tools, streaming parsers, or your own pipelines.
Can I use output in production?›
Yes, when you have validated it. Parsers and formatters here aim to be helpful for everyday tasks but are not a substitute for tests, schema validation, or security review where it matters.
Where can I read more about privacy?›
See our Privacy policy at /privacy for how exemplar.dev handles site analytics and general data practices.