Base64 Encode / Decode

Inspect tokens and payloads quickly with clean, readable output. Browser-only, instant, copy-ready.
🔒 Browser-only ⚡ Live transform 📋 Copy-ready 🧠 Token-friendly
Step 0 Load a sample (optional)
Step 1 Paste text / Base64
Step 2 Encode or decode
Step 3 Copy output

Examples

Click “Load example” to inspect a realistic token/payload (JWT, Base64URL, JSON, hex bytes…).
Tip: paste a JWT to decode header/payload for quick inspection (signature is not verified).
Privacy: This tool runs locally in your browser. Your input stays on your device — no uploads, no account, and no server processing. Read details in Privacy.
⚠️ Paste text or Base64
Inspect tokens and payloads quickly with clean, readable output.
Input length
0
Output length
0
Input size
0 B
Output size
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Inspector

Quickly inspect tokens. If you paste a JWT, header/payload will be decoded (signature not verified).
JWT detected
No
Header
—
Payload
—
Signature
—

Related tools

🧾 JSON Formatter 🧩 URL Encoder 📍 UTM Builder

Related guides

🧠 JWT Basics 🔐 Base64URL vs Base64 🧰 Debugging Tokens

What is Base64 Encode / Decode?

Base64 is an encoding that converts bytes into readable ASCII characters. It’s used to move data through text-only systems safely — like JSON payloads, URLs, headers, configs, and tokens.

Common use cases

Use this tool to quickly inspect or fix payloads in:

Base64 vs Base64URL

Base64URL is a URL-safe variant that replaces + and / with - and _, and often removes padding =. It’s common in tokens like JWT. Toggle Base64URL when you’re dealing with token segments.

FAQ

Does this tool upload my data?
No. Everything runs locally in your browser. Inputs stay on your device.
Why does decoding sometimes show weird characters?
The decoded bytes might be binary (not UTF-8 text). In that case, Base64 is carrying non-text data.
Does the JWT inspector verify signatures?
No. It only decodes header and payload for inspection. Signature verification needs the secret/public key.
Should I keep padding (=)?
For classic Base64, yes. For Base64URL tokens, padding is often removed — the tool handles both.

SEO search intents (what people actually look for)

Below are real-world search intents and query patterns related to Base64. This section is here to help users find the tool fast — not to spam keywords. Use these as “entry points” for debugging tokens, payloads, API data, and URL-safe encoding.

🔥 Most common queries

High-intent searches people type when they need Base64 encode/decode right now.

base64 decode base64 encode base64 decoder online base64 encoder online decode base64 to text encode text to base64 base64url decode base64url encode jwt base64 decode decode jwt payload base64 json decode decode token payload base64 without padding base64 add padding base64 to utf8 base64 string decoder base64 decode no upload browser base64 tool base64 decode instantly copy base64 output
Tip: Keep this page focused. If you want extra traffic, create 3–6 short guide pages for the clusters below and link them here.
🧾 JSON Formatter 🧩 URL Encoder 🧠 Browse guides 🧰 Browse all tools

🎯 Long-tail questions (better rankings, less competition)

Question-style searches. They convert well and rank easier than generic keywords.

how to decode base64 how to encode base64 what is base64 used for why base64 padding equals how to add base64 padding base64url vs base64 difference how to decode jwt header how to decode jwt payload why jwt uses base64url decode base64 json pretty base64 decode gives weird characters how to decode base64 from api response decode base64 in url query how to decode token payload safely is base64 encryption base64 not working invalid character base64 decode online no signup does base64 contain personal data how to read base64 data url decode base64 to utf8 text
Pro move: Write guides that answer 1 question per page (short, practical, no fluff). Google rewards clarity.

🧩 Query clusters (use-cases)

Grouped by intent. Each cluster can become a mini guide later (and you already have Guides in your nav).

decode jwt payload (tokens) jwt header decoder (tokens) base64url decode jwt (tokens) inspect token payload (tokens) decode base64 api response (api) base64 encode bytes (api) base64 decode json (api) debug base64 string (api) base64 in url query (urls) base64url encoder (urls) decode base64url to text (urls) safe url encoding (urls) add missing padding (fix) invalid base64 character (fix) base64 length multiple of 4 (fix) base64 without equals (fix) base64 decode offline (privacy) base64 tool no upload (privacy) browser-only base64 (privacy) no signup base64 decoder (privacy)
Keep it clean: These chips match user intent. Don’t duplicate paragraphs — add small guide pages and link them here.

✅ Mini guidance (helps users + helps SEO)

Base64 is encoding, not encryption. If you decode something and it looks unreadable, it may be binary bytes. For tokens, prefer Base64URL and remember padding = is often removed.

Base64 = encoding, not encryption Base64URL uses - and _ Padding = may be removed in tokens JWT = header.payload.signature Some decoded output is binary Runs locally in your browser
If you want to scale: add guides like “Base64URL vs Base64” and “How to decode JWT payload” — then link them in “Related guides”.
Last updated: 2026-01-30 · Browse all tools