Are my files ever uploaded to any server or cloud?

Never. FileConvert is 100% client-side. When you drop or select a file, your browser processes the bytes directly in device memory using HTML5 Canvas and pdf-lib. Zero bytes of your sensitive images or documents ever leave your phone or computer. You can verify this by turning off your internet connection-all tools will continue working normally.

Which image formats are supported for compression & conversion?

FileConvert supports all common formats including PNG, JPG/JPEG, WebP, GIF, SVG, and BMP. You can cross-convert between WebP, PNG, and JPG while choosing your exact target quality or specifying an exact target file size in kilobytes (KB).

How does client-side PDF merging work in the browser?

We use pdf-lib, an open-source binary PDF manipulation library running in browser JavaScript. It reads the raw byte streams of your PDF files, parses the page dictionary structures, copies page streams into a consolidated document, and serializes the new PDF binary directly to your local downloads without requiring backend server rendering.

Is there any file size limit?

Unlike traditional online converters that impose 5MB or 10MB limits, FileConvert has zero arbitrary server limits. The only constraint is your device’s available browser memory (RAM). Most modern smartphones and laptops easily process files up to 200MB+ in seconds.

How is performance and low INP (Interaction to Next Paint) maintained?

Heavy operations like image downsampling, quantization, and PDF byte stream packing are scheduled with asynchronous microtasks. This yields control back to the browser main thread between computational steps, ensuring the UI stays fluid at 60fps with minimal input latency during high-resolution processing.

100% Client-Side Memory100% Local

Client-Side Image Resizer

Resize Image Online - Change Dimensions in Seconds

Adjust photo dimensions by percentage or exact pixels with real-time preview and aspect ratio lock. 100% client-side with zero server uploads and zero privacy risk.

Zero server uploadsInstant browser execution100% Free & private

Tap or Drop to Resize Image

Supports: JPG, PNG, WebP, AVIF, HEIC, SVG, ICO, BMP & GIF

Choose Files

or pressCtrl+Vto paste screenshot or image

Files stay strictly on your device • Instant processing

Note: Because all processing happens 100% securely in your browser, larger images or advanced formats may take a few moments depending on your device's speed.

Image Resizing Settings (Optional)

Dimension Scaling

100%

Output Format

Strip EXIF MetadataPrivacy Safe

Removes GPS location, camera model, timestamps, and personal tags.

How to Resize Image in 3 Simple Steps

No software installation or account creation required. Everything runs locally on your smartphone, tablet, or desktop browser.

Choose Images to Resize

Tap Choose Files or drag and drop JPG, PNG, WebP, AVIF, or HEIC images into the dropzone.

Set Target Dimensions

Adjust the resolution slider (10% to 100%) or enter exact pixel width and height with aspect ratio locked.

Download Resized Images

Preview the new dimensions instantly and download individual resized images or a batch package.

High-Precision Dimension Resizing for Web, Social & Mobile

Whether preparing profile pictures, optimizing banners for blog posts, reducing wallpaper resolutions, or fitting strict pixel requirements for government and job portal uploads, resizing images shouldn’t require uploading sensitive files to cloud servers. FileConvert gives you an ultra-fast, 100% browser-based image resizer. Utilizing high-quality multi-pass bicubic canvas resampling in local device memory, it lets you scale dimensions by percentage or target exact pixel dimensions while maintaining sharp edges and true color fidelity.

100% Client-side sandbox

Zero server log retention

Thumb-friendly mobile layout

Technical Specifications

Parameter	Specification
Target Output Format	JPG / WebP / AVIF / PNG
Accepted Inputs	JPG, PNG, WebP, AVIF, HEIC, SVG, BMP, GIF
Size Constraint Mode	Percentage scaling (10%-100%) or exact pixel dimensions
Processing Engine	HTML5 Canvas High-Precision Bicubic Resampling
Privacy & Data Level	100% On-Device / Zero Server Uploads
Typical Processing Speed	< 40ms per megapixel

Frequently Asked Questions (Resize Image)

Q1.Does resizing images here blur or pixelate my photos?

We use hardware-accelerated bicubic resampling with imageSmoothing enabled. Downscaling produces crisp, sharp results without blurry artifacts, while keeping color profiles intact.

Q2.Are my photos uploaded to any external server?

Never. All dimension scaling and canvas rendering run entirely in your local browser sandbox using HTML5 Canvas and WebAssembly. Your photos never leave your device.

Q3.Can I resize multiple images at once?

Yes! You can drop multiple images into the queue simultaneously, apply a uniform percentage scale or tune individual photos, and download them all with a single tap.

Q4.What image formats can I resize?

FileConvert supports resizing JPG, PNG, WebP, AVIF, HEIC (iPhone photos), SVG, GIF, and BMP images.

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