base64tools.online

Fast & Private Base64 Tools

Convert, validate and inspect Base64 for PDFs, images and hex data — right in your browser. No uploads, no registration, no waiting.

Choose a tool below to get started ↓

Which Base64 tool do you need?

Base64 to PDF →Validate, preview and download a PDF from Base64 data.PDF to Base64 →Turn a PDF file into Base64 or a ready-to-use Data URI.JPG to Base64 →Encode JPG / JPEG images as Base64 with preview and dimensions.Base64 to JPG →Decode Base64 back into a JPG image you can preview and save.PNG to Base64 →Encode PNG images as Base64, Data URI, HTML or CSS snippets.Image to Base64 →Convert PNG, JPG, WebP, GIF or SVG images to Base64 with automatic format detection.Base64 to Hex →Decode Base64 into readable hexadecimal with byte counts.Hex to Base64 →Turn hex strings — with spaces, newlines or 0x prefixes — into Base64.Base64 Validator →Check, diagnose and fix Base64 data with a full inspection report.Base64URL Decoder →Decode URL-safe Base64 with automatic normalization and padding.

Privacy

Private by design

Your files and data stay in your browser.

Every tool on this site runs entirely on your device. Files you drop and text you paste are processed by your own browser — they are never uploaded, never sent to an API and never stored anywhere else. There is no account and no registration. We use privacy-respecting analytics to count overall site usage — they never see your files, your input or what you convert. Analytics cookies run only if you accept them, and you can change your choice at any time.

Why use these tools?

Use these tools to convert, validate and inspect Base64 directly in your browser, without uploading your files or pasted data. They also identify file types, explain input errors and offer one-click fixes where supported.

01
Validation first
Every input is checked before conversion, with errors that tell you exactly what is wrong: missing padding, URL-safe characters, invalid characters, or data that decoded fine but isn't the file type you expected.
02
A real inspector
See the detected file type, MIME type, encoding, padding status, decoded size and file signature for your data, not just a wall of output.
03
One-click fixes
Common problems like missing padding or Base64URL characters can be repaired automatically instead of by hand.
04
Built for developers
Copy cleaned Base64, download files, and grab JavaScript or Python snippets that do the same conversion in code.

Last updated: August 26, 2026

The whole workflow

Pick a tool above and paste your data — that's the whole workflow.

01
Free
All ten tools are free
02
Mobile + desktop
Work on mobile and desktop
03
No sign-up
Never ask you to sign up

free · mobile + desktop · no sign-up · paste & go