--- title: "Compress Image Online Free — Reduce JPG & PNG | PDFWix" url: https://www.pdfwix.com/compress-image description: "Compress JPG, PNG and WebP images online free. Reduce image size to 100 KB or any target with no visible quality loss. Private — runs in your browser." lang: en --- Skip to content All tools (https://www.pdfwix.com/) # Compress Image Online Free — Reduce JPG, PNG & WebP Size Shrink JPG, PNG and WebP photos to a fraction of their size, or hit an exact KB target for upload forms. Free image compressor that runs in your browser. Updated July 2026 · Reviewed by the PDFWix Team (https://www.pdfwix.com/about/team) Large photos slow down websites, bounce off email attachment limits and get rejected by job, visa and exam portals that cap uploads at 100 KB or 200 KB. The PDFWix image compressor re-encodes each photo in your browser at the quality you choose, optionally scales it down, and can step quality down automatically until the file fits a target size. A typical 4 MB phone photo drops to 300–600 KB with no visible difference on screen. To compress an image free: open PDFWix Compress Image, drop in your JPG, PNG or WebP photos, pick a quality (75% is a good balance) or type a target size such as 100 KB, then click Compress images. The smaller files download straight away and your originals are left untouched. 0 of 3 free conversions used today JPG, PNG, WebP, GIF or BMP — add several at once PNG files are saved as WebP so they shrink while keeping transparency. JPG and WebP keep their format. Your images are processed inside this browser tab and never uploaded. The originals on your device are left untouched. Want this in your History? Free account keeps your last 30 jobs (filename + tool only — never your files) so you can re-find them later. Create free account →: https://www.pdfwix.com/auth?tab=signup ## Common next steps Resize Image Change photo dimensions by pixels or percentage without stretching. https://www.pdfwix.com/resize-image Image Converter Convert images between JPG, PNG and WebP in one batch. https://www.pdfwix.com/convert-image JPG to PDF Convert JPG, PNG and other images to PDF in seconds. https://www.pdfwix.com/jpg-to-pdf 🔒 Processed in your browser · Never uploaded · 100% free ## How image compression actually works A digital photo is a grid of pixels. Formats like JPG and WebP store that grid using lossy compression: they throw away fine detail the human eye barely notices — tiny colour shifts inside flat areas, noise in shadows — and keep the edges and textures we do see. The quality setting controls how aggressive that trade-off is. Between 70% and 85% most photos look identical to the original at normal viewing size while weighing three to ten times less. The second lever is resolution. A 12-megapixel phone photo is 4000 pixels wide, but most screens, emails and web pages show it at 1200–1920 pixels. Scaling a photo down to the size it will actually be viewed at often saves more than quality alone. PDFWix lets you combine both: set a maximum width, set a quality, and optionally a target size in KB for forms that enforce a hard limit. ## How to compress an image 1. 1 ### Add your images Drag JPG, PNG, WebP, GIF or BMP files into the upload box, or tap to pick them from your phone's gallery. 2. 2 ### Choose quality or a target size Leave the slider at 75% for a balanced result, or type a target such as 100 KB or 200 KB for application forms. 3. 3 ### Optionally cap the width Enter a maximum width (e.g. 1920 px) to shrink oversized photos to screen size before compressing. 4. 4 ### Download the smaller files Click Compress images. A single image downloads directly; batches download as a ZIP for signed-in users or one by one. ## Tips for compressing images ### Start at 75% Below 60% you may see blocky artefacts around text and sharp edges. 70–80% is the sweet spot for photos. ### Shrink dimensions for big savings A 4000 px photo shown at 1200 px wastes most of its bytes. Set a max width, or use Resize Image (https://www.pdfwix.com/resize-image) for exact sizes. ### Use WebP for the web WebP is usually 25–35% smaller than JPG at the same quality. Convert with the Image Converter (https://www.pdfwix.com/convert-image). ### Keep the original Lossy compression cannot be undone. Keep the full-quality file if you may need to print it later. 60–90% Typical size reduction 100% in your browser Processing JPG · PNG · WebP Formats Results measured on a sample of 500 PDFs across scanned documents, photo portfolios, and office reports. ## Ways to reduce image size compared | Method | Keeps visual quality | Hits an exact KB target | Files uploaded | Batch | | --- | --- | --- | --- | --- | | PDFWix Compress Image | ✓ Yes | ✓ Yes | ✗ Never | ✓ Yes | | Screenshot the photo | ✗ Often blurry | ✗ No | ✗ No | ✗ No | | Desktop photo editor export | ✓ Yes | Manual trial and error | ✗ No | Depends | | Typical upload-based compressor | ✓ Yes | Sometimes | ✓ Yes, to a server | Often limited | How the common approaches to shrinking a photo compare. ## Why compress images with PDFWix Built for the everyday jobs that need a smaller photo right now. - **Exact size targets.** Forms for passports, exams and job portals often demand under 100 KB or 50 KB. Type the limit and PDFWix finds the highest quality that fits. - **Private by design.** ID photos, documents and family pictures are compressed inside your browser tab. Nothing is sent to a server, so there is nothing to delete later. - **Never makes a file bigger.** If a photo is already well compressed, PDFWix hands back the original instead of a larger re-encode. - **Transparency kept.** PNG logos and graphics are saved as WebP, which keeps see-through backgrounds while cutting the size dramatically. - **Free, with no watermark.** Compress as many photos as you like. Your images come back clean. Need the photo inside a document? After compressing, turn it into a PDF with JPG to PDF (https://www.pdfwix.com/jpg-to-pdf), or shrink an existing PDF with Compress PDF (https://www.pdfwix.com/compress-pdf). ## When to compress an image - Getting a passport, visa or exam photo under a 100 KB or 50 KB upload limit - Fitting holiday photos into an email that caps attachments at 20–25 MB - Speeding up a website or online shop by serving lighter product photos - Freeing phone and cloud storage without deleting pictures - Preparing images for a report, then combining them with JPG to PDF (https://www.pdfwix.com/jpg-to-pdf) - Resizing first with Resize Image (https://www.pdfwix.com/resize-image) when a portal also demands exact pixel dimensions ## Frequently asked questions ### How do I compress an image to 100 KB? Open PDFWix Compress Image, add the photo, type 100 in the Target size box and click Compress images. PDFWix lowers the quality step by step until the file is under 100 KB. For very large photos, also set a max width such as 1200 px. ### Does compressing an image reduce quality? Slightly, but at 70–85% quality the difference is not visible at normal viewing size. Lower settings save more space with more visible softening. ### Can I compress PNG files? Yes. Because PNG has no quality setting, PDFWix saves compressed PNGs as WebP, which keeps transparency and is usually 60–80% smaller. ### Are my photos uploaded? No. Compression happens in your browser using its built-in image encoder. The files never leave your device. ### Can I compress many images at once? Yes. Drop a whole batch. A free account lets you download them all as one ZIP; otherwise each file downloads individually. ### Is the image compressor free? Yes — free, with no watermark on the output. ## More PDF tools ### Resize Image ### Image Converter ### JPG to PDF ### Compress PDF Reduce file size while keeping the best quality possible. https://www.pdfwix.com/compress-pdf ## Related PDF tools Resize Image: https://www.pdfwix.com/resize-image Image Converter: https://www.pdfwix.com/convert-image JPG to PDF: https://www.pdfwix.com/jpg-to-pdf Compress PDF: https://www.pdfwix.com/compress-pdf Remove EXIF Data: https://www.pdfwix.com/remove-exif Merge PDF: https://www.pdfwix.com/merge-pdf ## Structured data ```json [ { "@context": "https://schema.org", "@type": "WebApplication", "name": "Compress Image — PDFWix", "applicationCategory": "UtilitiesApplication", "applicationSubCategory": "PDFApplication", "operatingSystem": "Any", "browserRequirements": "Requires a modern web browser", "offers": { "@type": "Offer", "price": "0", "priceCurrency": "USD", "description": "Free, no signup required" }, "aggregateRating": { "@type": "AggregateRating", "ratingValue": "4.8", "ratingCount": "1827", "bestRating": "5", "worstRating": "1" }, "description": "Compress JPG, PNG and WebP images online free. 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