100% local processing — your files and data never leave this browser. No uploads, no server storage.

OnboxTools

Image Tools

Certified Utility Suite

Access our specialized collection of image tools. Built for security and performance, these tools process all data locally.

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Base64 to Image

Decode Base64 strings back into high-quality JPG, PNG, or WebP images instantly.

Launch Base64 to Image
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Image Compressor

Reduce image file size by up to 90% without losing visual quality.

Launch Image Compressor
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Image Resizer

Change image dimensions and resolution while preserving quality or aspect ratio.

Launch Image Resizer
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Image to Base64

Convert images to base64 strings or Data URIs instantly for CSS, HTML, or JavaScript.

Launch Image to Base64
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Image to Data URI

Convert any image file into a Base64 encoded Data URI string for CSS and HTML.

Launch Image to Data URI
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JPEG to WebP

Convert standard JPEG/JPG images into high-performance WebP format with transparency control.

Launch JPEG to WebP
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JPG to PNG

Convert JPG images to PNG with advanced alpha channel and transparency options.

Launch JPG to PNG
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PNG to GIF

Convert PNG images to GIF format while preserving or removing transparency.

Launch PNG to GIF
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PNG to JPG

Convert transparent PNG images to high-quality JPG format with custom background colors.

Launch PNG to JPG

PNG Transparency Creator

Make any color in your image transparent instantly to create high-quality transparent PNGs.

Launch PNG Transparency Creator
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SVG to PNG

Convert SVG to PNG online — turn svg into png with custom size and scale, in your browser.

Launch SVG to PNG
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WebP to PNG

Convert WebP to PNG online — webp to png with transparency, in your browser.

Launch WebP to PNG
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Image Transcoding: Compression and Modern Web Formats

Optimizing visual assets is a balance between bitrate and perceptual quality. Our image tools focus on the transition from legacy formats like JPEG and PNG to high-efficiency formats like WebP and AVIF. By utilizing the browser's Canvas API and specialized WebAssembly (Wasm) modules, we provide high-ratio compression that reduces Luma and Chroma noise. Transcoding images locally allows for massive speed gains, as you avoid the upload-download cycle. Our converters preserve EXIF metadata when requested or strip it for privacy and file size reduction. For designers, the ability to convert images to Data URIs (Base64) simplifies the embedding of small assets directly into CSS or HTML, reducing HTTP requests and improving page load performance.

Image Tools FAQ

Does WebP conversion lose image quality?

WebP supports both lossy and lossless compression. Our tool defaults to a 75% quality ratio which typically reduces size by 30% with no visible loss.

What is a Data URI?

It is a method of embedding image data directly into code as a Base64 string, allowing the image to load without a separate file request.

Can I resize images in bulk?

Yes, our bulk processor allows you to set a fixed width or height while maintaining the aspect ratio across multiple files.