Image to Base64

Data URI Encoder

Convert PNG, JPEG, GIF, SVG, or WebP into a Base64 data URI or raw Base64 with preview and copy. Free, browser-only, up to 10 MB.

This conversion runs only in your browser — nothing is uploaded.

Drag & drop an image, or browse below

PNG, JPEG, GIF, SVG, WebP · max 10 MB

For UTF-8 text Base64 (not image files), use Base64 Encoder & Decoder

What is this tool?

This image to Base64 converter reads a local image with the browser FileReader API and produces either a full data URI (data:image/…;base64,…) or raw Base64 (payload only). Preview confirms the file before you copy.

Inlining is convenient for tiny icons, self-contained demos, and test fixtures. Base64 increases size by roughly one third and bypasses normal URL caching, so large photos belong on a CDN or static host—not inside HTML or email bodies.

Max file size is 10 MB. Prefer optimized assets under a few hundred KB when you must inline.

Common use cases

  • Build an img src or CSS background-image: url(…) without a separate asset request
  • Embed a small logo in an HTML email or signature (watch total message size)
  • Produce Base64 fixtures for unit tests or Storybook without committing binary files

How to use

  1. Drag an image onto the drop zone or browse (PNG, JPEG, GIF, SVG, WebP · max 10 MB).
  2. Confirm the preview and MIME / file-size chips.
  3. Choose Data URI or Raw Base64, then Copy.
  4. Use Sample for a 1×1 PNG smoke test; Clear resets the workspace.

Examples

UseShapeNotes
HTML image<img src="data:image/png;base64,…" alt="">Data URI tab; keep icons tiny.
CSS backgroundbackground-image: url("data:image/svg+xml;base64,…")Same tab; SVG often compresses well.
API / config fieldRaw Base64 only (no data: prefix)Raw tab after upload.
Oversized photo in emailPrefer linked URL instead of Base64Edge: many clients reject or clip large MIME parts.

Practical pitfalls

  • Email size: Base64 plus MIME headers can push messages past Gmail/Outlook limits; host photos and inline only micro-icons.
  • Large data URIs block the main thread while reading and inflate DOM/CSS; the UI warns above ~500 KB.
  • This tool is for image files. UTF-8 text Base64 (APIs, Basic Auth) belongs on the text Base64 encoder—not here.

References

Last reviewed: 2026-07-27

Frequently asked questions

What is the difference between Data URI and raw Base64?
A data URI is `data:image/png;base64,…` and can go straight into an `img` `src` or CSS `url()`. Raw Base64 is only the encoded bytes after the comma—useful when an API or config expects Base64 without the `data:` prefix.
Should I inline large images in email or HTML?
Usually no. Base64 increases size by about one third, and many email clients cap total message size. Prefer linked/hosted images for photos; reserve inlining for tiny icons or critical above-the-fold assets.
Is the image uploaded to a server?
No. The file is read with the browser FileReader API and never leaves your device.
How is this different from the Base64 encode/decode tool?
This page converts image files to data URIs or raw Base64. The text Base64 tool encodes UTF-8 strings for APIs and Basic Auth—not binary image files.