Compress JPEG, PNG, WebP and AVIF images to reduce file size while maintaining quality
Drag images here or click to select
Supports JPEG, PNG, WebP, AVIF (max 50MB per file, 50 files per batch)
Drop or select one or more JPEG, PNG, WebP, or AVIF images.
Adjust the quality slider to balance size reduction and visual fidelity.
Preview the compressed image and download individually or as a ZIP.
Images are compressed locally in your browser — your files never leave your device.
Compress JPEG, PNG, WebP, and AVIF images. Batch-compress multiple files at once.
Compare the original and compressed images side by side before downloading.
Unlike most online compressors that upload files to remote servers for processing, this tool compresses images entirely within your browser. Your photos, screenshots, and graphics are never transmitted over the internet. This is particularly important for proprietary product images, personal photos, and any content subject to confidentiality agreements.
Compress JPEG, PNG, WebP, and AVIF images — all in one tool. Drag and drop multiple files to process them simultaneously. No need to use different services for different formats. Batch compression with a single quality slider saves significant time when optimizing an entire gallery or website image library.
The adjustable quality slider lets you find the exact balance between file size and visual fidelity. Preview the compressed result side by side with the original before downloading so you can ensure the output meets your standards. This visual feedback loop eliminates the guesswork of blind compression.
Many free image compressors add watermarks, restrict resolution, or limit the number of files you can process per day. This tool has none of those restrictions. Compress as many images as you want, at any resolution, with no branding applied to your output files. The result is exactly what you expect — a smaller version of your image.
Image compression is the process of reducing the file size of digital images while attempting to preserve acceptable visual quality. It is a critical step in web development, email communication, and digital storage management. Uncompressed images can be several megabytes each, slowing down page loads, consuming bandwidth, and filling storage quickly.
Lossy compression permanently removes some image data to achieve smaller file sizes. JPEG is the most common lossy format — it uses discrete cosine transform (DCT) to discard high-frequency visual information that the human eye is less sensitive to. At moderate quality levels (60–80%), the visual difference is often imperceptible. Lossless compression reduces file size without discarding any data. PNG uses lossless compression, meaning the decompressed image is bit-for-bit identical to the original. Lossless compression achieves smaller size reductions but preserves every pixel perfectly.
WebP, developed by Google, supports both lossy and lossless compression and typically achieves 25–35% smaller files than JPEG at equivalent quality. AVIF, based on the AV1 video codec, pushes compression efficiency even further — often 50% smaller than JPEG. Both formats support transparency (alpha channels) and are increasingly supported by modern browsers.
The quality slider (typically 1–100) controls the aggressiveness of lossy compression. At 100, virtually no data is discarded, and the file remains large. At 50, significant data reduction occurs, and artifacts may become visible in gradients and fine details. The sweet spot for most web images is 70–85 — this range produces substantial file size savings with minimal perceptible quality loss.
srcset HTML attribute.loading="lazy" to defer loading images that are not immediately visible.Image optimization directly affects Largest Contentful Paint (LCP), one of Google's Core Web Vitals. Pages with large, unoptimized hero images often fail the 2.5-second LCP threshold. Compressing images, using modern formats, and implementing lazy loading can dramatically improve LCP scores, boosting both user experience and search engine rankings.
Total image weight should ideally stay below 500 KB for an entire page. If your page has many images, batch compression becomes essential. Processing all images at a consistent quality level ensures visual uniformity across the site.
JPEG compression uses a technique called chroma subsampling, which reduces color information while preserving luminance (brightness) detail. The most common scheme, 4:2:0, halves the color resolution in both horizontal and vertical directions, reducing the color data to one quarter of the original. Human vision is far more sensitive to brightness differences than color differences, so this reduction is usually imperceptible. However, at aggressive compression levels, chroma subsampling can produce visible color bleeding around high-contrast edges — such as sharp text on a colored background. This is why JPEG is suboptimal for screenshots with text and why PNG, which uses no chroma subsampling, produces crisper results for graphics and UI captures.
Email providers typically limit attachment sizes to 10–25 MB, and many enterprise mail servers impose even stricter limits. Compressing images before attaching them prevents bounced emails and reduces transmission time. Social media platforms (Facebook, Instagram, Twitter/X, LinkedIn) automatically recompress uploaded images using their own algorithms, often reducing quality further. By pre-compressing images to an optimal quality level before uploading, you maintain more control over the final appearance. For social media, target file sizes under 1 MB for photographs and under 200 KB for graphics. Use the preview feature to ensure text remains legible and important details are preserved after compression.
The tool supports JPEG, PNG, WebP, and AVIF formats. Each format uses different compression techniques — JPEG uses lossy DCT-based compression ideal for photographs, PNG uses lossless compression suited for graphics and screenshots, and WebP and AVIF offer advanced lossy and lossless options with better compression ratios than traditional formats.
No. All image compression runs locally in your browser using client-side JavaScript and the Canvas API. Your images never leave your device, are never transmitted over the network, and are never stored on any server. This makes the tool safe for confidential, proprietary, or personal images.
Typical reductions range from 40% to 80% depending on the source image, format, and quality setting. Photographs with many colors typically achieve 50–70% reduction at quality level 75. Screenshots and graphics with flat colors may see even larger reductions. The preview feature lets you verify quality before downloading.
For most web use cases, a quality setting between 70 and 85 provides an excellent balance of file size and visual fidelity. Hero images and product photos may warrant 80–85 for sharper detail, while thumbnails and background images can use 60–70 without noticeable quality loss.
Yes. Drag and drop or select multiple files to batch-compress them simultaneously. Each image is processed independently with the same quality settings. You can download all compressed images individually or as a single ZIP archive for convenience.
Yes. The compression process strips EXIF metadata (camera model, GPS coordinates, date taken) from the output. This is actually a privacy benefit, as it prevents location and device information from being embedded in images you share online.
WebP typically produces files 25–35% smaller than JPEG at equivalent visual quality. It achieves this through more advanced prediction algorithms and entropy coding. WebP also supports transparency (alpha channels), which JPEG does not. All major modern browsers support WebP.
There is no enforced limit. However, since processing runs in your browser, very large images (above 50 megapixels or very high-resolution panoramas) may be limited by your device's available memory. For most practical use cases — web images, social media, email attachments — the tool handles files without any issues.
At moderate quality settings (70–85), compressed images are virtually indistinguishable from the originals for most viewers. Visible artifacts like blurring or banding appear primarily at aggressive quality levels (below 50) or in areas with smooth gradients. Use the side-by-side preview to evaluate quality before downloading.
AVIF offers superior compression efficiency — often 50% smaller than JPEG at the same visual quality. However, browser support is slightly less universal than JPEG. The best approach is to serve AVIF to browsers that support it (via the HTML picture element) and fall back to JPEG or WebP for older browsers.
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