Text to Base64

Encode any plain text string to Base64 in one click. Useful for preparing API payloads, Basic Auth headers, data URIs, and any situation where a text string must travel through a binary-safe channel.

Last updated: May 28, 2026

Plain text input

URL-safe(uses - _ instead of + /)

Base64 output

Tip: Enable URL-safe mode when the output will appear in a URL or filename. Base64 is encoding, not encryption — it is trivially reversible.

Client-Side Processing

Input Data Stays on Device

Instant Local Execution

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What is Text to Base64?

Base64 encoding converts raw text into a safe ASCII character set made up of A–Z, a–z, 0–9, +, and /. This lets text move cleanly through systems that would otherwise mangle or strip binary characters — HTTP headers, JSON values, email bodies, URL parameters, and database fields.

Text to Base64 is the encode-only direction of the workflow. You paste readable text and get back a Base64 string ready to drop into an API call, config file, or auth header. No files, no server, no signup required.

How to Use Text to Base64

Paste or type your text in the input field

Click "Encode to Base64" to generate the encoded output

Enable URL-safe mode if the result will appear in a URL or filename

Click Copy to grab the Base64 string for your workflow

Use the swap button to move the output back as input for a round-trip check

Common Use Cases

Developers encoding credentials for HTTP Basic Authentication headers before sending a request.
Engineers embedding small text payloads directly inside JSON API fields without breaking JSON syntax.
Frontend developers creating data URIs for inline SVG or font assets.
QA testers encoding test strings to verify a decoder handles UTF-8 characters correctly.
Ops engineers encoding secrets or tokens before storing them in environment variables or config maps.

Example Input and Output

A typical use case is encoding credentials for an HTTP Basic Auth header before pasting into curl or Postman.

Plain text

api-user:s3cr3t-key-2026

Base64 output

YXBpLXVzZXI6czNjcjN0LWtleS0yMDI2

Base64 ≠ security

Base64-encoded strings look scrambled but are trivially reversible. If you are handling passwords or tokens, use proper encryption or a secret manager instead.

Size overhead

Base64 output is about 33% larger than the input. For large payloads being sent over the network, consider whether encoding is necessary or if the channel supports raw binary.

Frequently Asked Questions

Is Base64 encoding the same as encryption?

No. Base64 is a reversible encoding scheme, not encryption. Anyone with a decoder can recover the original text immediately. Never use Base64 to protect sensitive data.

Why does the Base64 output end with = or ==?

Base64 works in groups of 3 bytes. When the input length is not divisible by 3, padding characters (=) are added so the output length is always a multiple of 4.

Does this handle emojis and non-ASCII characters?

Yes. The encoder converts your text to UTF-8 bytes first, then encodes those bytes to Base64, so emojis, accented letters, and CJK characters all encode and decode correctly.

When should I use URL-safe Base64?

Use URL-safe mode when the Base64 string will appear in a URL query parameter, a filename, or a JWT. Standard Base64 uses + and / which have special meanings in URLs and can cause parsing errors.

Is my text sent to a server?

No. Encoding runs entirely in your browser. Your text never leaves your device, which makes this tool safe for encoding private tokens, credentials, or internal config values.