Base64Auto-Detect • Encode • Decode Client-side
Smart Base64 Tool
Paste or upload input and we detect whether it’s plain text or Base64, then show the right conversion instantly.
URL-safe Trim “=” padding Auto-detect
Save conversions and snippets in Postly
Keep reusable Base64 snippets, notes, and decoded artifacts organized from one dashboard.
Input
Save conversions and snippets in Postly
Keep reusable Base64 snippets, notes, and decoded artifacts organized from one dashboard.
URL-safe
Omit padding
Soft wrap
Waiting for input
Status
Ready.
• Paste or upload anything. We’ll detect Base64 vs plain text automatically.
• If Base64 decodes to binary data, you can download it.
• URL-safe maps
• If Base64 decodes to binary data, you can download it.
• URL-safe maps
+// ⇄ -/_ and decoding restores padding automatically.Save conversions and snippets in Postly
Keep reusable Base64 snippets, notes, and decoded artifacts organized from one dashboard.
Plain Text
Base64
Tips
- • Auto-detect tries to decode Base64 first; on failure, input is treated as plain text.
- • URL-safe accepts
-/_and converts them appropriately. - • Omit padding only affects encoding; decoding restores missing padding.
- • If Base64 decodes to binary, use Download Binary to save it.
Support the tool and keep your conversions organized
Use Postly to keep snippets and notes organized, then support the project below.