Image to Base64 Converter Online - Data URI Generator
Convert images to Base64 or Data URI instantly for HTML, CSS, and API payloads.
Popular ways to use this tool
JPG to Base64
Encode original JPEG file bytes as Base64
PNG to Base64
Encode original PNG file bytes as Base64
SVG to Base64
Encode original SVG source bytes as Base64
WebP to Base64
Encode original WebP file bytes as Base64
GIF to Base64
Encode original GIF file bytes as Base64
AVIF to Base64
Encode original AVIF file bytes as Base64
LQIP Generator
Create a tiny JPEG data URI for a CSS-blurred placeholder
Encoding and optional preprocessing run locally in your browser. This tool does not upload images or use server fallback. Supports JPG, PNG, WebP, AVIF, GIF, SVG, BMP, ICO, HEIC, and HEIF. Process images locally and export individual text, batch JSON, or a ZIP.
Why Use FastImageTools
Local Processing
Encodes and preprocesses in your browser without uploading images to a server.
Instant Developer Output
Copy-ready Base64, Data URI, HTML, CSS, and JSON snippets in one workflow.
Completely Free
No signup or watermark for standard use; batch limits depend on the current entitlement.
Developer-Ready Export
Export as TXT, JSON, or ZIP and integrate directly into frontend or backend code.
How to Convert Image to Base64
- 1
Upload JPG, PNG, WebP, AVIF, GIF, SVG, BMP, ICO, HEIC, or HEIF Images
Upload one file or a batch. Drag-and-drop and paste are supported for a faster workflow.
- 2
Choose Output Type and Encoding Options
Choose Data URI or Base64-only output, line wrapping, and optional metadata removal, resizing, or JPEG, PNG, or WebP conversion.
- 3
Download or Copy Encoded Output
Copy as plain text, HTML, CSS, or JSON, or download encoded files as TXT, JSON, or ZIP.
Local vs Cloud Base64 Conversion
FastImageTools (Local)
- Files stay on your device
- No image upload before encoding
- Limited by entitlement, browser memory, and device performance
- Free conversion with export options included
- Encoding runs locally after the app is available
Traditional Cloud Tools
- —Files are uploaded to remote servers
- —Upload/download overhead affects total time
- —Often restricted by free-tier quotas
- —Advanced exports commonly locked behind paid plans
- —Requires stable internet connection
Example Result
Original
Example: 12 KB PNG
product-card.png
Encoded text
About 16 KB of Base64 text
Source bytes preserved with preprocessing off
Supported Input Formats
JPEG / JPG
Common photo format. Good for compact payloads after optional re-encode.
PNG
Lossless format for screenshots and graphics with transparency.
WebP
Modern web format that often reduces payload size before Base64 encoding.
AVIF
High-efficiency format for smaller files on modern platforms.
GIF
Preserves original GIF bytes only when metadata removal, resizing, and re-encoding are disabled; otherwise animation may change.
SVG
Vector graphics format for logos, icons, and UI assets.
BMP
Uncompressed bitmap format for legacy and specialized use cases.
ICO
Icon format for favicons and Windows application icons.
Frequently Asked Questions
Will converting to Base64 reduce image quality?+−
Is it safe to convert images to Base64 here?+−
What is the maximum file size supported?+−
Can I convert multiple images to Base64 at once?+−
Should I use lossy or lossless format before Base64 encoding?+−
Which format is best for web Base64 usage?+−
How is browser-based encoding different from cloud tools?+−
Are my images uploaded to your servers?+−
Related Image Tools
Use these tools before or after Base64 conversion:
Compress Image
Reduce file size before Base64 encoding.
Resize Image
Create smaller dimensions for lighter encoded payloads.
Convert to WebP
Prepare modern format assets before encoding.
Convert to AVIF
Generate high-efficiency files for compact payloads.
Metadata Editor
Inspect or strip EXIF/GPS metadata before encoding.
Optimize for Web
Run all-in-one optimization before converting to Base64.