Encode or decode Base64 without pasting secrets on a server
Encode text to Base64 or decode it back, with full UTF-8 support and data: URI prefixes stripped automatically. Nothing is sent to a server.
Base64 Encode & Decode workspace
Drop files here or browse files
Drop a file here or browse to start.
- Encode or decode in one pane
- Full UTF-8, accents and emoji
- Strips data: URI prefixes for you
- Credentials never leave the tab
EditPDFKit converts text to Base64 and back using the browser's own btoa and atob over UTF-8 bytes, which keeps non-Latin characters intact and keeps the string inside the page.
Built and maintained by Akash Kore · About
How to Use the Free Online Base64 Encode & Decode Studio in 4 Steps
Simple 4-step walkthrough for fast, secure processing
Pick Encode or Decode
The two buttons at the top of the workspace set the direction, and the input pane renames itself to Plain Text or Base64 String.
Paste your string
Type or paste into the left pane. The conversion runs on each keystroke, so there is no button to press.
Read the result pane
Output appears on the right; an unparseable Base64 payload raises an amber message instead of silent garbage.
Copy or save it
Use the copy button, or download the output as result.txt.
EditPDFKit vs. Traditional Cloud Services for Base64 Encode & Decode
Why thousands of privacy-conscious users choose EditPDFKit over cloud converters
| Feature | EditPDFKit (editpdfkit.com) | Traditional Cloud Tools (iLovePDF, Smallpdf) |
|---|---|---|
| Where Files Are Processed | Directly on Your Device (Zero Uploads) | Uploaded to Remote Company Servers |
| Privacy & Safety | Zero Uploads • Files Never Leave Your Device | Files Uploaded and Retained on Remote Company Servers |
| Local Hardware Acceleration | Uses your device's multi-core CPU and WebAssembly for instant output | Processes on shared cloud servers with upload and download delays |
| Built-in Privacy Vault | Saved Privately on Your Device (View or delete anytime) | Saved on Cloud Servers (Cannot verify if or when deleted) |
| Daily Usage Limits | 100% Unlimited & Free Forever | Free tiers commonly cap daily files; check their pricing pages |
| File Size Limits | No Limits (Process files of any size) | Free tiers commonly cap upload size; check their pricing pages |
| Works Without Internet | Yes • 100% Offline (Works without Wi-Fi) | No • Fails without constant internet connection |
| Account & Sign In | No Signup • No Login • Zero Email Required | Commonly requires an account or email to use fully |
| Watermarks on Your Files | 100% Clean • No Watermarks Ever | Free tiers commonly add a watermark or charge to remove it; check their pricing pages |
How Base64 Encode & Decode Works: Keep Your Files Safe & Private
See step-by-step how your files are processed. Everything happens right inside your browser — your files are never uploaded to the internet or shared with anyone.
1. Open on Your Device
When you pick a file, your browser opens it directly on your computer or phone. Your document stays on your device and is never uploaded anywhere.
2. Process in Your Browser
Your device does all the work right inside your browser. Because there are no server queues or waiting lines, your files are processed instantly.
3. Save in Private Vault
When you save your work, your file is stored securely inside your browser's private vault on your device. You can view or reopen it anytime, even without internet.
4. Download, Reuse, or Delete
Download your finished file, send it directly to another tool without re-uploading, or click 'Clear Vault' to permanently erase your files anytime with one click.
How You Can Prove Your Files Never Leave Your Device
Open this tool, turn off your Wi-Fi or turn on Airplane Mode, and drop your file. It will still edit, convert, or compress and let you download the result! This proves the tool works completely offline without sending anything to any server.
Press F12 on your keyboard (or right-click anywhere and choose "Inspect"), click on the Network tab, and process your file. You will see 0 bytes of your file sent over the web — absolute proof of 100% privacy.
Base64 Encode & Decode Technical Specifications & Device Capabilities
Key features, device compatibility, and supported file types
Runs Directly on Your Device
Processed by your browser with zero waiting or upload lag
100% Private (0 Files Uploaded)
Safe for bank statements, IDs, tax forms, and confidential files
100% Watermark-Free
Clean original documents ready for official submissions
.txt
Drag & drop or paste directly from clipboard (Ctrl+V)
100% Free With No Limits
No account needed, no daily limits, no paywalls
Works on All Phones & Computers
iPhone, Android, Windows PC, Mac, iPad, and Chromebook
Need to Hit an Exact File Size Upload Limit?
Online job boards, immigration visa portals, universities, and court e-filing systems enforce strict KB ceilings. Select a calibrated target size solver below to compress without losing readability.
Legal & Court Portals
Strict compliance while keeping vector text razor sharp.
Exam, Job & Visa Portals
The ceiling UPSC, SSC, bank exam and visa forms set most often.
Job Portals & HR Forms
Ideal for resume attachments, certificates, and multi-page scans.
Email & Universities
Reduces large PDF decks under standard mail attachment limits.
Any Custom Limit
Set an exact target size with interactive compression preview.
Looking for a Free Alternative to Popular Cloud Tools?
Unlike cloud-based services that upload your files to remote servers or enforce hourly limits, EditPDFKit runs 100% in your browser.
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Frequently Asked Questions About Base64 Encode & Decode
Everything you need to know about Base64 Encode & Decode on editpdfkit.com