Loading tool…
UTF-8-safe Base64 encode & decode with a URL-safe variant, line-wrapping and file-to-Base64 (data URI).
Paste or type your input here, Base64 Encoder/Decoder is loading…
Among ToolsMonk's developer tools, Base64 Encoder/Decoder covers a single everyday need: utf-8-safe base64 encode & decode with a url-safe variant, line-wrapping and file-to-base64 (data uri). Open the page and start working, with no download or sign-up standing between you and the result.
This tool is especially useful for workflows such as encoding credentials or tokens for a basic auth header while testing an api, decoding a base64 string from a config, jwt part, or data uri to read it, and embedding small payloads as base64 in code or urls. Because it runs directly in your browser, you can use it on desktop, tablet, or mobile while keeping the process fast and easy for one-off tasks as well as repeat work.
Base64 Encoder/Decoder is also a strong fit for people searching for base64 encode, base64 decode, and base64 converter, because it combines a simple interface with instant results and privacy-friendly processing.
| Price | Free, no signup, no paywall, no watermark |
|---|---|
| Works on | Any modern browser: desktop, tablet, and mobile |
| Processing | In your browser, files never leave your device |
| Account required | None |
| Category | Developer Tools |
Paste your text or Base64 string
Choose encode or decode
The converted result appears instantly
Copy it for use in your code or request
Encode text to Base64 and decode Base64 back to text in one tool
Handles full Unicode (UTF-8), so emoji and accented characters survive the round trip
Instant conversion as you type or paste
One-click copy of the result
Runs in your browser, your data is never uploaded
Free, with no signup and no rate limit
Encoding credentials or tokens for a Basic Auth header while testing an API
Decoding a Base64 string from a config, JWT part, or data URI to read it
Embedding small payloads as Base64 in code or URLs
Inspecting Base64-encoded data during debugging
At its core, Base64 Encoder/Decoder does one thing well, utf-8-safe base64 encode & decode with a url-safe variant, line-wrapping and file-to-base64 (data uri), with instant, accurate results. There is no software to install and no account to create; the tool is ready the moment the page loads.
Privacy and portability drive the design: all processing runs locally in your browser, so your files and data never leave your device. It behaves identically in every modern browser, from a desktop workstation to a phone.
Base64 Encoder converts text to Base64 and back, representing data in an ASCII-safe form that travels reliably through systems expecting text. It's a daily utility for developers working with APIs, data URIs, and config.
The single most important thing to understand is that Base64 is encoding, not encryption. It scrambles nothing and protects nothing, anyone can decode it instantly without a key. Its job is safe transport: embedding an image in CSS, putting credentials in a Basic Auth header, or including binary in JSON, all without corruption. For anything that must stay secret, use real encryption.
The tool encodes as UTF-8, so Unicode, emoji, accents, non-Latin scripts, round-trips correctly, avoiding the mangled-character bug that trips up naive implementations. And because encoding runs in your browser, sensitive strings like tokens never leave your device.
Keep in mind Base64 output is roughly a third larger than the input, since every three bytes become four characters. Pair this with the URL Encoder and JWT Decoder for a complete toolkit when debugging requests and payloads.
Never treat Base64 as security, it's reversible by anyone; encrypt data you actually need to protect
If a decode produces garbled characters, the source likely wasn't UTF-8, check the original encoding
Remember the ~33% size increase when embedding Base64 in code or URLs
Common questions about this tool, its workflow, and what to expect before you use it.
No ratings yet. Be the first to say how Base64 Encoder/Decoder worked for you.
Reviews appear here once our team has read them, so everything you see is from someone who signed in and used the tool.
Get notified about new tools, features, and tips. No spam, unsubscribe anytime.
Tech companies collect an astonishing amount of your personal data. Learn what data is being collected, your legal rights under GDPR and CCPA, how to request data deletion, and practical steps to minimize your digital footprint.
Read the guide 8 min readPhishing emails fool 30% of recipients. Learn how to spot sophisticated phishing attempts, protect your accounts, and use free security tools to verify suspicious emails, links, and attachments before they compromise your data.
Read the guide 8 min readBase64 encoding is everywhere in web development, from data URIs and email attachments to API tokens and image embedding. Master Base64 encoding/decoding with practical examples and ToolsMonk's free converter.
Read the guide 7 min readYour ISP, hackers, and advertisers track every website you visit. Learn how VPNs work, when you actually need one, how to choose the right service, and free alternatives for protecting your online privacy and security.
Read the guide 8 min readEncode and decode URLs and components, with a live breakdown of query parameters.
Try itDecode and inspect a JWT's header, payload and claims with human-readable timestamps and live expiry status.
Try itGenerate MD5, SHA-1, SHA-256, SHA-384, SHA-512 and HMAC digests for text or files.
Try itTest and debug regular expressions with live match highlighting, capture groups, replace and example patterns.
Try itMinify HTML, strip comments and whitespace while protecting pre/script/style, with a size-saved readout.
Try itMinify CSS, remove comments and whitespace safely (strings and data URIs preserved) with a size-saved readout.
Try itConvert JSON to YAML and YAML back to JSON, bidirectional, no server round-trip.
Try itConvert CSV data into a JSON array of objects, with smart number and boolean detection.
Try itWriting a roundup or tutorial? Embed the live Base64 Encoder/Decoder so readers use it right on your page, or drop in a ready-made card that links to it. Free to use, always.
Preview
UTF-8-safe Base64 encode & decode with a URL-safe variant, line-wrapping and file-to-Base64 (data URI).
Use Base64 Encoder/Decoder free →Live tool (iframe)
Readers use the real, working tool right on your page, with a small credit line underneath.
Embed card (HTML)