Image to Base64 Encoder - Decoder

Image to Base64 Encoder & Decoder — fast, accurate, developer-ready

Work both ways without switching tabs. This combined tool lets you convert an image to a clean Base64 string or decode a Base64 string (or full data URI) back into a real image file. It auto-detects the correct MIME type, supports PNG, JPG, JPEG, GIF, SVG, WebP, ICO, BMP, and TIFF, and presents outputs that paste cleanly into editors, API consoles, and build pipelines. Drag & drop files, paste from clipboard, or use the picker; the live preview and length counters keep you confident about what you’re shipping.

Why a dual encoder/decoder matters in real projects

Teams constantly move between inlining assets and extracting them. You might embed a small logo into HTML/CSS, then later need to decode that same data URI from a template, a webhook log, or an API response. QA needs to verify image payloads; designers want quick encodes for prototypes; developers must decode to optimize and commit the final asset. Keeping both directions in one place eliminates MIME mistakes, stray whitespace, and broken padding.

Experience you can trust

Designed around real developer workflows, the tool cleans inputs, trims hidden characters, and tolerates harmless line breaks. For encoding, you get three views at once: raw Base64, full data URI with the correct prefix, and a wrapped version for readable diffs and reviews. For decoding, paste either a bare Base64 string or a data:image/...;base64, URI—both work. A live preview confirms correctness, while counters show original size vs. Base64 length so you understand overhead before committing.

How it works

On encode, the tool reads the image, determines its MIME, and produces standards-compliant output (for example, data:image/png;base64, for PNG). On decode, it normalizes the input, reads the MIME from the data URI if present, or infers a safe type from signature bytes, then reconstructs the image as a byte-accurate file. SVGs are handled safely, while PNG/JPG/GIF/WebP and others use binary decoding so the file you download matches the preview exactly.

What you can do with it

Inline icons in HTML emails and CSS backgrounds. Ship single-file demos without external assets. Send images inside JSON for webhooks and serverless functions. Extract images from logs, exports, or API responses. Move assets from prototypes to production by decoding back to properly named files with predictable extensions that your pipeline recognizes.

Quality and consistency

Accurate MIME detection includes image/svg+xml for SVG and image/vnd.microsoft.icon for ICO where appropriate. Copy operations strip invisible characters. Optional JPEG quality and quick resize keep Base64 payloads lean for photos; PNG and SVG preserve crisp lines and transparency. Helpful error hints catch invalid or incomplete Base64 input, and the predictable file naming keeps automation simple.

Key features

• Encode images to Base64 & decode Base64 to images in one tool
• Supports PNG, JPG, JPEG, GIF, SVG, WebP, ICO, BMP, and TIFF
• Auto MIME detection and correct data-URI prefix generation
• Three encode outputs: raw Base64, full data URI, wrapped for JSON/code
• Instant decode preview with dimensions and estimated size
• Optional JPEG quality and quick resize on encode
• One-click copy, download (text or image), share, and clear
• Input normalization with whitespace/line-break tolerance
• Clear error hints for invalid or partial Base64

Fast start for encoding

1. Drop or paste an image.
2. Choose raw Base64, full data URI, or wrapped output.
3. (Optional) Adjust JPG quality or resize width.
4. Copy or download the string as a text file.

Fast start for decoding

1. Paste a Base64 string or full data URI.
2. Preview instantly to confirm.
3. Download the image with the correct extension.

Helpful tips

• Inline only tiny assets (icons, marks, badges); cache larger images as files.
• Prefer PNG or SVG for crisp logos; use JPG with quality control for photos.
• Confirm whether your API expects raw Base64 or a full data URI—the tool provides both.
• If decoding fails, check for missing padding or characters added by email clients.
• Reuse Base64 strings for repeated icons to avoid bundle bloat.

FAQs

Which formats are supported
PNG, JPG, JPEG, GIF, SVG, WebP, ICO, BMP, and TIFF. MIME is detected or inferred automatically.

What’s the difference between raw Base64 and a data URI
Raw Base64 is just the encoded bytes. A data URI includes a prefix like data:image/png;base64, plus the bytes. Use data URI for HTML/CSS; use raw Base64 for APIs and JSON fields.

Can I reduce Base64 size for photos
Yes. Lower JPEG quality or resize before encoding. For PNG/SVG, simplify the source where possible.

Do I need the data-URI prefix to decode
No. Paste either a full data URI or a bare Base64 string—the decoder handles both.

Is SVG handled safely
Yes. The tool uses image/svg+xml and encodes/decodes so it renders reliably across modern browsers.