Base64 Encoder Online Free
Convert text to Base64 or decode Base64 strings instantly — standard (+/) or URL-safe (-_) modes for JWTs and query strings. Encode and decode tabs share one page with live output and shareable state.
Utiliio vs Base64Encode.org — Private Base64 EncodingEverything runs in your browser. Your input is never uploaded, stored, or logged on our servers.
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Related guides
Base64 Encoder Online Free — Encode & Decode in Browser
Encode text to Base64 or decode Base64 strings online — standard and URL-safe modes, live round-trip, no upload.
Read guideWhat Is Base64 Encoding?
Learn what Base64 encoding is, why developers use it, and how to encode or decode Base64 strings online — including URL-safe mode.
Read guideHow to Share Utiliio Tool Links With Preserved Input
Share JSON, JWT, regex patterns, workbench state, and more via URL — input is encoded in the link and restored when opened. Nothing stored on our servers.
Read guideFrequently asked questions
How do I encode Base64 online for free?+
Paste text into the Encode tab — Base64 output updates live. Toggle URL-safe mode for JWT-style encoding. No upload required.
What is URL-safe Base64?+
URL-safe Base64 replaces + with - and / with _ and omits padding. Use it in JWTs, query strings, and filenames where standard Base64 characters cause issues.
Is this tool free?+
Yes. Every Utiliio utility is free with no sign-up, usage limits, or paywalls.
Do you store my data?+
No. Processing happens entirely in your browser. Your input never leaves your device.
Can I use this tool offline?+
Yes. Once the page loads, most tools continue working without an internet connection.