Multi-Base Encoder / Decoder
Encode and decode data in Base16, Base32, Base58 (Bitcoin), Base64, Base64URL, and Base85 (ASCII85). Client-side with file upload support.
Multi-Base Encoder/Decoder
Encode and decode data in Base16, Base32, Base58, Base64, Base64URL, and Base85 formats.
Base Format
Standard RFC 4648 with padding
Input (text or file)
Output
Stats
Frequently Asked Questions
What does it do?
Encodes/decodes data across six base formats: Base16 (hex), Base32 (RFC 4648), Base58 (Bitcoin alphabet), Base64, Base64URL, and Base85 (ASCII85), with live conversion and file upload.
Which Base58 alphabet?
Bitcoin alphabet (123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz), excluding the ambiguous 0, O, I, l. BigInt-based so arbitrarily large inputs work precisely.
Is my data sent to a server?
No. All encoding runs in your browser via TextEncoder/TextDecoder and native BigInt. Text and uploaded binaries never leave your device.
Is the Multi-Base Encoder / Decoder free to use?
Yes, the Multi-Base Encoder / Decoder is 100% free with no registration, no hidden fees, and no usage limits. All processing happens locally in your browser, ensuring complete privacy.
Does the Multi-Base Encoder / Decoder work on mobile devices?
Yes, the Multi-Base Encoder / Decoder is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.
Do I need to create an account to use this tool?
No account or registration is needed. Simply open the Multi-Base Encoder / Decoder in your browser and start using it immediately. There are no sign-up walls or usage restrictions.
What programming languages or formats does this support?
The Multi-Base Encoder / Decoder supports a wide range of popular formats and languages. Check the tool interface for the full list of supported options.
How do I use the Multi-Base Encoder / Decoder?
Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.
Which browsers are supported?
The Multi-Base Encoder / Decoder works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.
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About Multi-Base Encoder / Decoder
Multi-Base Encoder / Decoder is a free, browser-based tool in our Developer Tools collection. Everything runs locally on your device — no uploads, no sign-up, and your data stays private.