Base64 Encoder
Encode text strings or files to Base64 format. Used in data URIs, email attachments and API authentication.
About the Base64 Encoder
Base64 represents binary data using only 64 printable characters: upper and lower case letters, digits, plus and slash. It carries data through systems designed for text, such as email attachments, data URLs in web pages and tokens in web APIs.
Base64 is an encoding, not encryption. Anyone can decode it instantly, so it provides no secrecy. Never use it to hide passwords or personal information. It also makes data about one third larger, because every three bytes of input become four characters.
A URL-safe variant replaces plus and slash with hyphen and underscore so the result can sit inside web addresses. Use this tool to encode text and the matching decoder to turn Base64 back into the original.
The text "Hello" encodes to SGVsbG8=, and decoding SGVsbG8= returns "Hello". The trailing equals sign is padding that makes the length a multiple of four.
Tips for best results
- If decoding produces garbled characters, the original may use a different text encoding or may be binary data.
How to use the Base64 Encoder
Why use Toolseza for Base64 Encoder?
Use this tool as often as you need with no paywalls, premium tiers, or hidden daily calculation quotas.
All calculations and file manipulations run inside your web browser. Your inputs are never sent to a cloud server.
Results update in real-time as you type or adjust settings, with instant one-click copy and export capabilities.
Works natively on smartphones, tablets, laptops, and desktop computers with zero installation or account creation.
Editorial Standards & Verification: All formulas, algorithms, and conversion factors implemented on Toolseza adhere to openly documented international standards (ISO, NIST, BIPM, W3C). Results are verified against benchmark reference datasets before publication.
Frequently Asked Questions
Is Base64 Encoder free to use?
Yes — Base64 Encoder is completely free, unlimited, and requires no sign-up.
Why use Base64 encoding?
Base64 encodes binary data as ASCII text so it can be safely transmitted in JSON, emails, URLs, or other text-based formats that do not support raw binary.
Does the output follow the standard spec?
Yes — output follows the standard format, so it's compatible with other tools and libraries.
Does it work on mobile and tablet?
Yes — Base64 Encoder works on any modern browser, including mobile and tablet, no app required.