Convert images between JPG, PNG, WebP, and BMP formats instantly in your browser.
Convert images between different formats quickly and easily with our free online image converter. Transform JPG to PNG, PNG to WebP, or convert between dozens of popular image formats without installing any software. Our browser-based converter works on all devices and operating systems while keeping your images completely private since all conversions happen locally in your browser. Perfect for photographers, web designers, and anyone who needs to change image formats regularly.
Different image formats serve distinct purposes and understanding them helps you make the right choice. JPEG is ideal for photographs and images with many colors, using lossy compression that creates small file sizes but sacrifices some quality. PNG supports transparency and uses lossless compression, making it perfect for logos, graphics with text, and images where quality is paramount. WebP offers superior compression compared to both JPG and PNG but has limited support in older browsers. GIF works for simple animations but is limited to 256 colors, making it unsuitable for photographs.
Understanding compression is crucial for maintaining image quality. Converting from JPEG to PNG won't magically restore quality lost during the original JPEG compression - you can't recover data that's already been discarded. Always keep original high-quality versions of your images before converting or editing. When converting for web use, balance file size against visual quality. Smaller files load faster improving user experience and SEO, but excessive compression creates visible artifacts and pixelation that look unprofessional.
JPEG excels for photographic content, offering small file sizes that load quickly on websites and in emails. PNG is essential when you need transparency for logos and graphics that overlay other content. WebP provides the best of both worlds with superior compression and transparency support, ideal for modern websites focused on performance. SVG vector format works brilliantly for icons and illustrations that need to scale perfectly at any size. Choose TIFF for professional print work and archival storage where maximum quality matters more than file size.
Test different quality settings to find the optimal balance for your specific use case. Convert in batches when working with multiple images to save time and ensure consistent results. Verify converted images display correctly in your target environment before deleting originals. Consider your audience - if supporting older browsers, stick with JPG and PNG rather than newer formats like WebP. Rename files systematically to keep track of formats and versions, preventing confusion when managing large image libraries across different projects and platforms.
JPEG (JPG): The internet's workhorse format uses lossy compression ideal for photographs and complex images with gradients. File sizes are typically 50-75% smaller than PNG for photos, making JPEG perfect for websites, email attachments, and social media. However, each time you save a JPEG, quality degrades slightly - never repeatedly edit and save the same JPEG. Best for: photographs, product images, portraits, landscapes, any image where minor quality loss is acceptable for dramatic file size reduction.
PNG (Portable Network Graphics): Lossless compression means perfect quality preservation with larger file sizes. PNG's killer feature is alpha channel transparency support, making it essential for logos, icons, and graphics that overlay other content. PNG-8 supports 256 colors with smaller files, while PNG-24 handles millions of colors with larger files. Best for: logos with transparency, graphics with text, screenshots, images requiring multiple edits, icons, illustrations, any image where quality cannot be compromised.
WebP: Google's modern format offers superior compression compared to both JPEG and PNG - typically 25-35% smaller files at equivalent quality. WebP supports both lossy and lossless compression plus transparency, making it incredibly versatile. The main drawback is limited support in older browsers (pre-2020). Best for: modern websites prioritizing performance, progressive web apps, any project where cutting-edge browser support is guaranteed, situations where you need transparency with smaller file sizes than PNG.
AVIF: The newest contender offers even better compression than WebP - often 50% smaller than JPEG at similar quality. AVIF supports HDR, wide color gamuts, and excellent detail preservation. However, browser support is still catching up (2021+), and encoding is slower. Best for: cutting-edge web projects, high-quality image galleries, situations where maximum compression with quality retention matters most, future-proofing your image pipeline.
GIF: Limited to 256 colors, making it unsuitable for photographs but perfect for simple animations. GIF uses lossless compression for its color palette. File sizes balloon quickly with animation, so keep frame counts low. Best for: simple animations, pixel art, images with very limited color palettes, memes, situations where animation support matters more than image quality.
Image optimization directly impacts your website's loading speed, which affects both user experience and search engine rankings. Google's Core Web Vitals measure page performance, and images are typically the largest files your visitors download. A single unoptimized 5MB photo can make your page load 3-5 seconds slower on mobile connections. Convert large images to WebP or compress JPEGs to 80-85% quality - most users won't notice quality differences, but they'll definitely notice faster load times.
Studies show that 53% of mobile users abandon pages taking longer than 3 seconds to load. Every 100KB you shave off image sizes improves load time by approximately 0.1-0.3 seconds depending on connection speed. Use responsive images with multiple sizes - don't force mobile users to download desktop-sized images they'll never see at full resolution. Lazy loading combined with modern formats like WebP can reduce initial page weight by 60-70%, dramatically improving perceived performance and actual load metrics.
E-commerce Product Photos: Convert product images to JPEG at 85-90% quality for main photos, use PNG for images with transparency like jewelry on white backgrounds. Generate WebP versions as alternatives for modern browsers. Aim for 100-200KB per image maximum - users shopping on mobile need fast-loading product galleries. Consider AVIF for hero images where maximum quality at minimum file size matters most.
Social Media Optimization: Each platform has preferred formats and dimensions. Instagram compresses JPEGs heavily, so start with high-quality originals at 1080x1080 for posts. Facebook supports WebP, allowing smaller uploads with better quality. Twitter prefers PNG for graphics with text to avoid compression artifacts. LinkedIn optimizes for professional images - use JPEG for photos, PNG for infographics and charts.
Email Marketing: Keep total email size under 100KB to avoid spam filters and slow loading. Convert images to JPEG at 70-80% quality. Avoid PNG unless transparency is absolutely necessary - email clients handle JPEG better. Use image compression tools to reduce file sizes without visible quality loss. Remember that many email clients block images by default, so optimize both file size and alt text.
Print Preparation: Convert images to TIFF or high-quality JPEG (95-100%) for print work. Ensure images are at least 300 DPI at final print size - a 4x6 inch photo needs 1200x1800 pixels minimum. Never upscale images for print - low-resolution images will look pixelated regardless of format. Keep original RAW or uncompressed files as masters before converting to print formats.
Understanding compression quality settings prevents both bloated files and visible artifacts. For JPEG, quality 90-100 produces files barely distinguishable from originals but with large sizes. Quality 80-85 is the sweet spot - excellent visual quality with 40-50% smaller files. Quality 60-70 works for thumbnails and previews where file size matters more than perfection. Below 60, visible compression artifacts appear - blocky patterns, color banding, and blurry edges.
WebP quality settings work similarly but achieve better results at equivalent numbers - WebP 80 often matches JPEG 85-90 in quality while being 25-30% smaller. PNG compression is lossless, so the only trade-off is processing time versus file size - higher compression takes longer but produces smaller files with identical quality. Always compare before-and-after files side by side at actual viewing size before committing to quality settings for important images.
JPEG and PNG work everywhere - every browser since the 1990s supports them completely. WebP gained widespread support in 2020 when Safari finally added it - now 95%+ of browsers handle WebP. AVIF support arrived in 2021-2022 with about 85% coverage currently. Use the HTML picture element with multiple sources to provide modern formats with fallbacks - browsers automatically select the best format they support.
Check your website analytics to see browser usage patterns. If 5-10% of visitors use older browsers, provide JPEG/PNG fallbacks. For internal tools or modern web apps where you control the environment, use WebP or AVIF exclusively for maximum performance. Content management systems like WordPress can automatically generate multiple formats and serve the optimal version based on browser capabilities.
Converting images one at a time wastes time when handling dozens or hundreds of files. Develop a systematic workflow - create folders for originals, processed files, and different format outputs. Use consistent naming conventions like "product-001.jpg" and "product-001.webp" to track related files. Document your quality settings and conversion parameters so you can reproduce results consistently across projects.
For photographers and designers, establish a master file archive with highest-quality originals (RAW, TIFF, or PNG) that never get modified. Create derivatives for different purposes - web versions, print versions, social media versions. Set up automated workflows that generate all necessary formats whenever you add new images. This prevents the nightmare of trying to recreate missing versions later.
Yes, always. JPEG uses lossy compression, so converting from lossless PNG to JPEG discards some image data. However, for photographs and complex images, the quality loss at 80-90% JPEG quality is often imperceptible to human eyes while dramatically reducing file size. Never convert logos, text images, or graphics with sharp edges to JPEG - the compression creates visible artifacts around text and lines.
No. Converting JPEG to PNG just wraps the already-compressed data in a different container. Quality lost during JPEG compression cannot be recovered by converting to PNG. The resulting PNG will be larger than the JPEG but with identical visual quality. Only convert to PNG if you need to edit the image multiple times without further quality loss or if you need to add transparency.
WebP for modern websites supporting recent browsers - it offers the best balance of quality, file size, and compatibility. Provide JPEG fallbacks for older browsers using the picture element. Use PNG only for images requiring transparency or images with text and sharp edges. AVIF offers even better compression but requires more careful browser support checking and testing.
Converting between lossy formats (JPEG, WebP lossy) multiple times compounds quality loss - each conversion discards more data. Converting JPEG to PNG to JPEG again doesn't restore lost quality and wastes time. Always keep original high-quality versions and only convert from originals to final formats. Never use a previously converted file as the source for further conversions.
Test by comparing outputs at different quality levels. Start at 85% for JPEG, compare to the original, and adjust based on what you see. For web use, prioritize file size - if you can't see quality differences at 80%, use that setting. For print or professional work, use 90-95%. Always view test conversions at actual display size - images look worse when zoomed to 200% than they do at intended viewing size.
For web images, yes - EXIF metadata (camera settings, GPS coordinates, timestamps) adds unnecessary file size and potential privacy concerns. Our browser-based converter automatically strips metadata during conversion. For archival or professional photography workflows, preserve metadata in master files but remove it from web-published versions. Some platforms like Facebook strip metadata automatically upon upload.
"Save for Web" optimizes specifically for online viewing - it strips unnecessary metadata, optimizes compression for RGB color space, converts color profiles to sRGB, and applies slight sharpening to compensate for screen display. Regular conversion maintains all metadata and color profiles, producing larger files. For website images, always use web-optimized conversion settings to minimize file size without visible quality loss.