Encode plain text into Base64 or decode a Base64 string back into text. UTF-8 safe, handles emojis and non-Latin scripts correctly.
Intuitive, friction-free workflow designed to get you from blank slate to job-ready in minutes.
Choose Encode or Decode mode.
Paste your text or Base64 string.
Copy the converted output.
Engineered for speed, privacy, and recruiter compliance
Targeted for modern job applications and career moves
Browser-native btoa/atoa silently fail on non-Latin characters. Our encoder uses TextEncoder so any input round-trips perfectly.
Zero paid tiers, hidden subscriptions, or paywalls
No forced email signups or credit meters
Parsed inside your browser, never stored in DB
No watermark branding or export limits
Authoritative standards for passing ATS filters and catching hiring managers' attention.
Base64 converts binary data into ASCII text so it can travel through systems that only accept text, email, JSON fields, data URLs and JWT tokens all use it. Developers encode images inline for small icons and decode API payloads that return Base64 strings.
Base64 is not encryption. Anyone can decode it. Never treat Base64 as security. It is a transport encoding, not a way to hide secrets.
Text in languages beyond ASCII, including Urdu, Arabic and emoji, requires UTF-8 aware encoding. A broken encoder mangles multibyte characters into question marks. Synctoolo handles UTF-8 end to end so your decoded text matches what you encoded.
When embedding images as data URLs in HTML or CSS, watch file size. Base64 expands data by roughly 33 percent. For large assets, use a CDN URL instead of inline encoding.
Straightforward answers regarding ATS compliance, PDF rendering, and data privacy.
Base64 encodes every 3 bytes as 4 characters, a ~33% size increase. That's the trade-off for safe text representation of binary data.
No, it's encoding. Anyone can decode Base64 instantly. Never use it to hide passwords, tokens or secrets.
Padding. Base64 outputs come in multiples of 4 characters; one or two '=' signs are added when the input length isn't a multiple of 3.
Yes. We accept both standard and URL-safe (-/_ instead of +//) variants and normalise them before decoding.
Select Encode mode, type or paste your text, and the Base64 output appears instantly. It's UTF-8 safe, so accents and emoji encode correctly. Copy the result with one click.
Select Decode mode and paste the Base64 string. The tool converts it back to the original UTF-8 text and shows a clear message if the input isn't valid Base64, ideal for reading an API or JWT payload.
In-depth articles and tutorials to get the most out of Base64 Encoder / Decoder.
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Stop corrupted symbols and question marks in text files. Understand how UTF-8 multibyte encoding works, why Mojibake happens, and how to fix encoding mismatches.
Understand the structure of JSON Web Tokens without security risks. Learn how Base64url encoding works, how to inspect claims locally, and how to verify cryptographic signatures.