ConvertBlink
EN

Image to Base64 Data URI Encoder (JPG/PNG/GIF/WebP)

Encode a JPG, PNG, GIF or WebP into a Base64 data: URI you can paste into HTML, CSS or JS. Runs in your browser, files stay on your device.

Browser Native
Privacy First
Free Tool

Convert Now

Drag & drop your file here

or

How It Works

Sometimes you want an image to live inside your code rather than next to it: a 16px icon in a CSS file, a logo in a single-file HTML email, a placeholder baked into a component. This tool takes a JPG, PNG, GIF or WebP and gives you back a `data:image/png;base64,...` string that drops straight into an `img` src, a CSS `background-image: url(...)`, or a JS variable. There's a Copy button on the result so you don't have to hand-select a string that can run thousands of characters long. Worth knowing before you encode: the output is always a PNG data URI, whatever you put in. The browser decodes your file, draws it to a canvas, and re-exports it as PNG. So a PNG round-trips losslessly, but a JPG or WebP gets decoded to pixels and re-encoded — the existing JPEG artifacts are baked in, and the resulting PNG string is usually bigger than the original file. An animated GIF collapses to its first frame, because the canvas only captures one still. The Base64 step itself adds about a third to the byte count: every 3 bytes of image become 4 ASCII characters. That overhead is the cost of inlining an asset and dropping an HTTP request, which is why this pays off for small things (icons, sprites, low-res placeholders) and works against you for full-size photos. It all runs in your tab. The file is read and encoded locally with the canvas and FileReader APIs and never touches a server, so a private screenshot or an internal UI asset stays on your machine.

Related Conversion Tools

Discover more powerful converters that might be useful for your workflow

Image to WebP Converter: JPG, PNG, BMP, GIF to WebP

Convert JPG, PNG, BMP, or GIF to WebP in your browser. Lossy WebP for smaller, faster-loading pages. No uploads, fully private, works offline.

.jpg.jpeg +3
Try Now

JPEG to Base64 Data URI Encoder, Free In-Browser

Encode a JPEG into a Base64 data URI you can paste into HTML, CSS, or JS. Runs fully in your browser, nothing uploaded. Copy the string in one click.

.jpg.jpeg
Try Now

PNG to Base64 Converter: Encode PNG as a Data URI

Encode a PNG into a Base64 data URI in your browser. Paste it into HTML, CSS, or JS to inline small icons. No upload, one-click copy, lossless.

.png
Try Now

PSD to PNG Converter: Open Photoshop Files in Browser

Open a Photoshop PSD without Photoshop. This tool reads the file's saved composite and exports a flat PNG with transparency, entirely in your browser.

.psd
Try Now

PNG to SVG Converter: Trace Logos & Icons to Vector

Trace PNG logos, icons and line art into editable SVG paths in your browser. Free, no uploads, no watermark. Honest about what vectorizing can't do.

.png.jpg +1
Try Now

SVG to PNG Converter: Rasterize Vectors in Browser

Rasterize SVG vector files to PNG bitmaps in your browser. Keeps the alpha channel, controls output size, no uploads, no watermark, no sign-up.

.svg
Try Now

MoreCANVAS

canvas → webp

Convert toBASE64

jpg → base64png → base64
View All Converters

Key Features

  • No file uploads required - works offline
  • 100% privacy focused - client-side processing
  • Browser powered - no software installation
  • Fast processing - WebAssembly technology
  • Free forever - no premium accounts

Supported File Formats

.jpg .jpeg .png .gif .webp

Output Format: Base64

Technical Specifications

input Format JPG/JPEG, PNG, GIF, WebP
output Format Base64 data URI (data:image/png;base64,...) as a copyable text string
compression Type Base64 text encoding; image re-encoded to PNG (lossless) on a canvas first
quality Retention PNG input round-trips losslessly; JPG/WebP keep their existing artifacts; GIF keeps the first frame only
color Space Support RGB with full 8-bit alpha, via the PNG output
max Resolution Limited only by your device's memory
processing Time Instant, runs in your browser

Key Benefits

  • Inline an icon or logo to remove an HTTP request
  • Copy button grabs the entire data: URI in one click, prefix included
  • PNG output keeps alpha transparency from PNG and WebP inputs
  • Encodes locally in your browser — no file is ever uploaded
  • One tool handles JPG, PNG, GIF and WebP inputs
  • Output is ready to paste into HTML img, CSS url() or a JS variable

Common Use Cases

  • Embedding small UI icons directly in a CSS stylesheet
  • Inlining a logo into a single-file HTML email or report
  • Generating low-quality image placeholders for lazy loading
  • Bundling assets into a self-contained HTML or SVG file
  • Storing a tiny image as a text field in a database or JSON
  • Dropping an image into a Markdown or code snippet without hosting it
  • Encoding a private screenshot without sending it to a server

Pro Tips

  • Keep Base64 for small assets; large photos bloat your source and lose separate browser caching
  • Expect roughly 33% more bytes than the source, plus extra from the JPG/WebP-to-PNG re-encode
  • Animated GIFs collapse to their first frame here, so keep real animations as linked files
  • The output always carries an image/png prefix, even for JPG or WebP input
  • Copy the whole string including data:image/png;base64, or it won't render

Frequently Asked Questions

The image is decoded to raw pixels on a canvas and re-exported as PNG before the Base64 step, so the URI always starts with data:image/png;base64. The pixels match what your input displayed, but for a JPG you end up with a lossless PNG of an already-lossy image, which is usually larger than the original JPG. If you specifically need a data:image/jpeg URI, this tool won't produce one.
Paste it anywhere a URL goes. HTML: <img src="data:image/png;base64,iVBOR...">. CSS: background-image: url('data:image/png;base64,iVBOR...'). JS: assign the whole string to a variable or to element.src. The Copy button puts the full URI on your clipboard with the data:image/png;base64, prefix included, so it renders as-is.
Yes. Base64 stores 3 bytes as 4 ASCII characters, so the text is roughly 33% larger than the binary. JPG and WebP inputs grow further because they're re-encoded to PNG here. Inlining still wins for tiny assets since you save a network request, but it's the wrong call for large photographs.
Only the first frame is kept. The canvas grabs a single still, so the animation and all later frames are dropped and you get a static PNG data URI. To keep an animation inline, leave the GIF as a separate linked file instead of encoding it here.
Yes. Because the output is PNG, alpha channels from PNG and WebP inputs carry through, so a transparent icon stays transparent. JPG has no transparency to begin with, so there's nothing to lose there.
No. Decoding, canvas rendering and Base64 encoding all happen inside your browser tab. The file is never sent to a server, which makes this safe for confidential screenshots, internal UI assets, or anything you wouldn't want passing through a third party.
Inline small, critical assets: icons, logos, 1px gradients, low-quality placeholders, above-the-fold sprites — cases where removing one HTTP request speeds up first paint. Link everything else. Large inlined images bloat your HTML or CSS, can't be cached as separate files, and get re-downloaded on every page that embeds them.
No fixed cap beyond your device's memory. A very large image lives both in a canvas and as a long string, so a huge file can be slow or run the tab out of memory. In practice Base64 inlining only makes sense for small assets, so this rarely bites.