Image to Base64 converter

1. Add your images. Drag and drop them onto the box above, or click to browse. You can convert a single icon or dozens of files in one pass.
2. Wait a moment. Each file is read with the browser's FileReader API and turned into a Base64-encoded data URI almost instantly — even large images finish in well under a second.
3. Copy what you need. Every result card gives you four one-click copy buttons: the raw Base64 string, the full data URI, an <img src="…"> snippet, and a CSS background-image: url(…) snippet.
4. Download if you prefer a file. Use Download .txt to save the data URI as a plain text file you can paste into code, email, or a ticket later.

Because everything happens on your device, there is no upload limit, no waiting on a server, and no watermark — just an instant Base64 string you can drop straight into your code.

Base64 is a way of representing binary data — like the bytes that make up a JPG or PNG file — using only 64 printable ASCII characters (A–Z, a–z, 0–9, plus + and /). Because binary data often breaks text-based formats like HTML, CSS, JSON, and XML, Base64 encoding lets you embed an image directly inside those formats as plain text instead of linking to a separate file.

A Base64-encoded image is usually wrapped in a data URI, which looks like this:

The data:image/png;base64, prefix tells the browser (or any program reading it) three things: this is a data: URI, the MIME type is image/png, and the payload after the comma is Base64-encoded. Everything after the comma is the raw Base64 string — the part you get from the Copy raw Base64 button above.

• Fewer HTTP requests. Embedding a small image as a data URI means the browser doesn't need a separate round trip to fetch it, which can shave milliseconds off a page's load time for icons, logos, and other small assets.
• Self-contained files. A Base64 image can live directly inside HTML, CSS, JSON, Markdown, or a config file, so there is no broken-link risk when a file gets moved, renamed, or emailed separately from its images.
• Email-safe images. Some email clients and API payloads don't reliably load external images. Embedding the image as a Base64 string avoids that entirely.
• API and database storage. Many REST APIs, webhooks, and database fields only accept text. Converting an image to Base64 lets you pass image data through a JSON body or store it in a text column.
• CSS sprites and icons. Small UI icons and background patterns are often inlined directly into a stylesheet as background-image: url(data:image/svg+xml;base64,…) to avoid extra asset files.
• Offline and single-file tools. Reports, PDFs-to-HTML exports, and single-file web apps often embed every asset as Base64 so the whole document works without any external dependencies.

Base64 encoding isn't free — it inflates the encoded data by roughly 33% compared to the original binary file, and inlined images can't be cached separately by the browser the way a linked .jpg or .png file can. For large photos, hero images, or anything reused across many pages, a normal linked file (ideally compressed first) is almost always the better choice. Base64 tends to make the most sense for small, one-off assets: icons, logos, tiny UI decorations, or images that need to travel inside a text-only payload like JSON.

If you are embedding a photo rather than an icon, run it through our image compressor first — a smaller source file means a smaller Base64 string on the other end.

This converter generates all four automatically, so you can grab whichever one matches where you're pasting it — no manual string surgery required.

A Base64 data URI behaves exactly like any other URL string, which means it drops straight into modern frameworks without any special handling:

• React / Next.js: pass the data URI directly as the src prop — <img src={dataUri} alt="…" />. If you use next/image, note that the built-in optimizer expects a remote URL or a static import, not an inline data URI, so a plain <img> tag is usually simplest for embedded Base64 images.
• Vue: bind it the same way with :src="dataUri", or store it in a CSS custom property and reference it from a style binding.
• Inline styles: in any framework, a Base64 background works as style={{ backgroundImage: `url(${dataUri})` }} — exactly what the CSS snippet button on this page produces, just wrapped for JSX.
• Markdown and static site generators: most Markdown renderers accept a data URI in the standard ![alt](data:image/png;base64,...) image syntax, so a Base64 image will render in READMEs, blog posts, and docs sites without hosting a separate file.
• JSON APIs: when an API field expects a plain string (no data: prefix), use the Copy raw Base64 button rather than the full data URI, then reconstruct the prefix on the receiving end if the API needs to know the MIME type.

The MIME type in a data URI — the part right after data: and before ;base64 — tells the browser how to decode and render the payload. This tool detects it automatically from the file you drop in, but it helps to know the common ones:

Every modern browser — Chrome, Firefox, Safari, and Edge — has supported data: URIs for images for well over a decade, so compatibility is essentially a non-issue for web use. The one place to be careful is very old email clients and a handful of legacy PDF/document viewers, some of which strip or ignore data URIs entirely; for those targets, a hosted image link is the safer fallback.

Yes. This tool never uploads your images anywhere. Everything happens locally using the browser's built-in FileReader.readAsDataURL() API, which reads the file straight from your disk into memory and encodes it as a data URI without a network request. It works offline once the page has loaded, nothing is logged or stored, and closing the tab clears everything instantly. That makes it safe for confidential screenshots, unreleased designs, client assets, and personal photos alike.

• Frontend developers inline small icons and logos as Base64 to cut HTTP requests and keep CSS sprites self-contained.
• Backend and API engineers convert an image to Base64 to embed it in a JSON payload, webhook, or database text field where binary uploads aren't supported.
• Email developers embed logos and signature images directly into HTML emails so they render reliably across clients that block external images.
• No-code and low-code builders paste a Base64 data URI into a tool that only accepts a text field for an image source.
• QA and support teams attach a Base64-encoded screenshot to a bug report, Slack message, or ticket without hosting it anywhere.
• Students and hobbyists learning how data URIs and MIME types work by inspecting a real encoded string.

Under the hood, this converter uses FileReader.readAsDataURL(), a standard browser API built for exactly this job. When you drop a file into the box above, the browser reads the file's raw bytes from disk, encodes them using the Base64 alphabet, and hands back a complete data URI string — all inside a few milliseconds for a typical icon or photo, without ever touching the network.

That is fundamentally different from how most “online converter” sites work, where your file is uploaded to a server, processed remotely, and the result is sent back down. Because this tool never leaves the FileReader sandbox, there is no server round-trip, no processing queue, and no dependency on an internet connection once the page has loaded — you could disconnect Wi-Fi mid-session and it would keep working.

If you are building your own version of this in code, the pattern is short: create a FileReader, call readAsDataURL(file), and read the result in the onload callback. Splitting on the first comma separates the data:mime;base64, prefix from the raw Base64 payload — which is exactly what powers the Copy raw Base64 button on this page.

• Forgetting the MIME prefix. A raw Base64 string on its own can't be rendered as an image — it needs the data:image/…;base64, prefix so the browser knows how to decode it. Use the data URI copy button, not the raw string, when pasting into an <img> tag.
• Encoding large photos instead of compressing first. A 5 MB photo becomes a roughly 6.7 MB Base64 string, which will bloat your HTML, CSS, or JSON payload and slow down parsing. Compress or resize first.
• Mismatched MIME type. If you manually build a data URI, make sure the MIME type in the prefix actually matches the file — a PNG saved with an image/jpeg prefix may render incorrectly or not at all in strict parsers.
• Line breaks or whitespace in the string. Some copy-paste paths (especially from PDFs or rich text editors) can insert stray line breaks into a Base64 string, which breaks decoding. Copying directly from this tool avoids that.
• Using Base64 for every image on a page. Inlining dozens of images bloats the HTML or CSS file itself and defeats browser caching. Reserve it for a handful of small, reused assets like a logo or favicon.

• Keep Base64-embedded images small — icons, logos, and simple graphics under a few KB are ideal candidates.
• Compress or resize a photo before encoding it; a smaller source file means a shorter, more manageable string.
• Use SVG where you can — vector icons compress to very short Base64 strings and stay crisp at any size.
• Remember the ~33% size overhead: a 30 KB PNG becomes roughly 40 KB once encoded as Base64 text.
• For images reused across many pages, prefer a linked file so the browser can cache it — reserve Base64 for one-off, single-use assets.

Need to go the other direction — turn a Base64 string back into a downloadable file, or decode any other text? Our Base64 encoder / decoder handles plain text and general-purpose decoding.