Local image tools

Browser-Side Image Compressor with Size Comparison

Choose a file or try a generated sample. Adjust format, quality and dimensions, inspect the actual-pixel preview, and download only when the result works for you. Images are processed on this device; the Data handling page explains network and analytics boundaries.

Browser-side processingBefore-after size comparisonWEBP, JPG, and PNG export

Local image · JPG, PNG, WEBP · max 15MBData handling

Privacy note: This tool processes its working input in your browser. Selected images or pasted text are handled with browser-side file, canvas, or text APIs for this tool. No account is required for this public tool. Review data handling.

Free ToolBrowser-side processing

Image Compression Studio

Reduce file size with WEBP, JPG, or PNG export controls, optional downscaling, and before-after size feedback.

Drop image here or click to upload

Up to 20 JPG / PNG / WEBP images, max 15 MiB each

No image uploaded

Try a sample before choosing a file

Generated on this device and processed by the same tool as your files. These are synthetic test images, not photographs or a promise of results.

1200 × 800 pixels. File sizes and font rendering can vary by browser.

Mobile processing guidance

On mobile, start with a JPG/PNG/WebP under 10MB and enable dimension limits for very large photos.

File limit

Max 15 MiB and output under 36MP.

Low-memory risk

Large dimensions use browser canvas memory even when the file size is small.

Retry path

If compression fails, retry with WEBP/JPG, lower quality, or a 1600px/1200px dimension cap.

Compression Controls

Choose format and quality, then optionally cap dimensions for a smaller export.

Compression goal

Start with an outcome. Open custom controls only when you need exact format, quality, or dimensions.

Target preset

Pick a starting point for common upload and publishing jobs. You can fine-tune quality and dimensions after applying a preset.

Personal presets store settings only in this browser—never files, names, image content, or metadata.

Output format

Current output

1600 x 1600px

Quality82%

Format note

PNG may become larger after export because it is lossless. Transparent images keep transparency in PNG and WEBP, while JPG fills transparency with white.

Limit dimensions

Cap width and height without upscaling smaller images.

Max width

Max height

Browser-side compression

Image pixels are decoded and encoded in this browser; compression does not require uploading your image. Site assets and statistics enabled under your privacy choices still use the network.

Preview and output

Waiting for image

Choose an image to generate a compressed output.

Inspect and download

Review the details and actual file size before keeping an output. Batch errors and the run report stay with the results.

Choose an image to see the compressed output preview.

Quick answer

An image compressor reduces file size by changing format, quality, dimensions, or a combination of all three.

Use a preset or target a byte budget, then inspect the original and output at actual pixels. The local JSON report records this run’s files, measured sizes, dimensions, encoder settings and failures; it also accompanies batch ZIP exports. Check its filenames before sharing it.

Best inputs for compression

Use large web images

Photos, screenshots, and social images often shrink well when exported as WEBP or JPG.

Choose intent before format

Use WEBP for web delivery, JPG for compatibility, and PNG when transparency or lossless output matters.

Target modes

Pick the compression target before tuning quality

The tool presets are starting points for common publishing jobs. Apply one, then adjust quality, format, or dimensions if the preview shows artifacts or the output is still too large.

Web image

Start with WEBP, encoder quality setting 82/100, and a 1600 px cap for blog images, landing-page visuals, docs screenshots, and knowledge-base graphics.

Email attachment

Use JPG at a lower quality and a 1200 px cap when the goal is a small file that opens reliably in mail clients and support systems.

Avatar

Use a smaller 800 px cap for profile photos, community icons, author headshots, and account images that will render in compact spaces.

E-commerce

Keep a higher quality JPG and a 2000 px cap when product detail, edges, labels, and zoom previews matter more than the smallest possible file.

Social upload

Use WEBP with a 1200 px cap for social posts, thumbnails, and preview images, then check text and edges at mobile size before publishing.

Best-fit workflows

Compression is most helpful when image file size affects upload, delivery, or page speed.

Website images and blogs

Export WEBP or JPG files that are lighter for articles, landing pages, and documentation.

Marketplace uploads

Reduce large product photos before uploading to platforms that limit file size.

Email and support attachments

Compress screenshots and photos when you need smaller attachments without opening a design app.

Compression tips that help

Format and dimension choices matter as much as quality.

Try WEBP first for web images, then use JPG if the destination does not support WEBP.

Lower quality gradually. A move from 90 to 82 may reduce size, but inspect text and edges: encoder settings do not measure retained visual quality.

If the source is huge, set a max dimension before compressing. Fewer pixels usually means smaller files.

Compress vs resize vs convert

Choose the right image operation

Compress

Choose compression when the image already has the right frame and dimensions, but the file is too large for page speed, upload limits, or sharing.

Resize

Choose resizing when the pixel dimensions are larger than the final display size. Fewer pixels usually reduce file size before quality changes.

Convert

Choose conversion when the destination needs a different format, such as WEBP for web delivery, JPG for compatibility, or PNG for transparency.

Example

For example, choose a JPG, try WEBP with encoder setting 82/100, and cap large inputs at 1600 px when the destination does not need more pixels. Compare the actual output size and preview; keep the source if the export is larger or visibly worse.

Assumption

The browser can decode the source image and encode the selected output format. WEBP support depends on the browser.

Limitation

Canvas export may remove metadata, PNG may not shrink, very large images can stress browser memory, and very low quality settings can create visible artifacts.

Common mistakes to avoid

These checks help prevent bad outputs, failed exports, and confusing results.

Compressing PNG as PNG

PNG export is lossless, so it may stay large or even grow. Use WEBP or JPG when file size matters more than transparency.

Leaving oversized dimensions

Quality changes help, but a 4000 px image still carries many pixels. Cap dimensions before export when the image will be displayed smaller.

Dropping quality too far

Very low quality can create blocky artifacts and muddy text. Compare the preview before downloading final assets.

Guides and examples

Use this tool in a real workflow

Image Compressor guide

Reference for formats, quality controls, transparency limits, and common compression errors.

Open resource

Media publishing workflow

A practical guide to image and video preparation with explicit input and output steps.

Open resource

Frequently asked questions

How is the image processed?

Image decoding, compression and export run in this browser without sending image pixels to a compression server. Site assets and statistics enabled under your privacy choices still use the network; see Data handling for the full boundary.

Which image formats are supported?

The tool accepts JPG, PNG, and WEBP images. It exports WEBP, JPG, or PNG, plus AVIF when the current browser encoder supports it.

Which format should I choose?

AVIF and WEBP are compact modern options when supported, JPG is widely compatible, and PNG can preserve the rendered canvas without an additional lossy encode and retain transparency; it does not restore source detail or guarantee unchanged metadata.

Why did my PNG become larger?

PNG encoding preserves the rendered canvas, not necessarily the original file or its metadata. Browser canvas encoding may not beat the source optimizer. Compare actual bytes and inspect text or alpha edges before keeping an output.

Can I compress multiple images?

Yes. Select up to 20 JPG, PNG, or WEBP files. A failed item does not stop later files, and successful outputs remain available for download.

Can I reduce dimensions while compressing?

Yes. Enable the max dimension controls to cap width and height. The tool downscales larger images and does not upscale smaller images.

Suggested workflow