[{"data":1,"prerenderedAt":797},["ShallowReactive",2],{"compare-kompressor-vs-preview":3,"compare":191},{"id":4,"title":5,"body":6,"description":180,"extension":181,"meta":182,"name":183,"navigation":184,"path":185,"seo":186,"sitemap":187,"stem":189,"__hash__":190},"compare/compare/kompressor-vs-preview.md","Kompressor Vs Preview",{"type":7,"value":8,"toc":172},"minimal",[9,14,18,22,121,125,128,132],[10,11,13],"h2",{"id":12},"the-short-answer","The short answer",[15,16,17],"p",{},"For one image now and then, use Preview. It is free and already on your Mac. Kompressor is the better tool when you convert many images, when you need WebP, or when the file size is important.",[10,19,21],{"id":20},"comparison","Comparison",[23,24,25,40],"table",{},[26,27,28],"thead",{},[29,30,31,34,37],"tr",{},[32,33],"th",{},[32,35,36],{},"Kompressor",[32,38,39],{},"Preview",[41,42,43,55,66,77,88,99,110],"tbody",{},[29,44,45,49,52],{},[46,47,48],"td",{},"Price",[46,50,51],{},"$14.99 one-time, 3 free conversions",[46,53,54],{},"Free, part of macOS",[29,56,57,60,63],{},[46,58,59],{},"WebP output",[46,61,62],{},"Yes",[46,64,65],{},"No",[29,67,68,71,74],{},[46,69,70],{},"Batch conversion",[46,72,73],{},"Files and folders with drag and drop",[46,75,76],{},"Export Selected Images, one folder",[29,78,79,82,85],{},[46,80,81],{},"Folder structure",[46,83,84],{},"Kept, with the Preserve folder structure setting",[46,86,87],{},"Not kept",[29,89,90,93,96],{},[46,91,92],{},"Result preview",[46,94,95],{},"Original and result side by side, with file size",[46,97,98],{},"No preview of the result",[29,100,101,104,107],{},[46,102,103],{},"Resize",[46,105,106],{},"In the same step",[46,108,109],{},"A separate step that changes the original",[29,111,112,115,118],{},[46,113,114],{},"Remove metadata",[46,116,117],{},"All metadata, for all images",[46,119,120],{},"Location only, one image at a time",[10,122,124],{"id":123},"what-preview-does-well","What Preview does well",[15,126,127],{},"Preview opens almost every image format that Kompressor reads, because both use the image system of macOS. File > Export converts one image in a few clicks, and the export dialog shows an estimate of the file size for JPEG. Preview also crops, rotates and annotates images, which Kompressor does not do.",[10,129,131],{"id":130},"where-preview-stops","Where Preview stops",[133,134,135,149,155,161],"ul",{},[136,137,138,142,143,148],"li",{},[139,140,141],"strong",{},"WebP."," macOS reads WebP but does not write it, so Preview has no WebP option. See ",[144,145,147],"a",{"href":146},"/guide/how-to-convert-png-to-webp","how to convert PNG to WebP",".",[136,150,151,154],{},[139,152,153],{},"Many images."," Preview can export a selection of images, but with one setting for all of them, without a preview, and into one folder.",[136,156,157,160],{},[139,158,159],{},"Quality control."," You do not see the compressed image before you export it. You must export, open the result and try again.",[136,162,163,166,167,171],{},[139,164,165],{},"Speed."," In our test, Kompressor converted 32 iPhone photos from HEIC to JPEG in 0.3 seconds. ",[168,169,170],"code",{},"sips",", the command-line tool that uses the same macOS encoder as Preview, needed 1.1 seconds.",{"title":173,"searchDepth":174,"depth":174,"links":175},"",2,[176,177,178,179],{"id":12,"depth":174,"text":13},{"id":20,"depth":174,"text":21},{"id":123,"depth":174,"text":124},{"id":130,"depth":174,"text":131},"Preview is free and on each Mac, and it converts images. This is what Preview does well, where it stops, and when Kompressor is worth $14.99.","md",{},"Kompressor vs Preview",true,"/compare/kompressor-vs-preview",{"title":5,"description":180},{"loc":185,"lastmod":188},"2026-11-10","compare/kompressor-vs-preview","zBcOUt6xqdUE_YSaAb5qmoJkFO8FViuaepex3ecB6ds",[192,376,492,648],{"id":193,"title":194,"body":195,"description":368,"extension":181,"meta":369,"name":370,"navigation":184,"path":371,"seo":372,"sitemap":373,"stem":374,"__hash__":375},"compare/compare/kompressor-vs-imageoptim.md","Kompressor Vs Imageoptim",{"type":7,"value":196,"toc":362},[197,199,209,211,315,319,322,326],[10,198,13],{"id":12},[15,200,201,202,208],{},"The two apps do different jobs, and many people use both. ",[144,203,207],{"href":204,"rel":205},"https://imageoptim.com/mac",[206],"nofollow","ImageOptim"," makes existing PNG, JPEG and GIF files smaller and keeps their format. Kompressor converts images to a different format, such as WebP, AVIF or HEIC, and resizes them.",[10,210,21],{"id":20},[23,212,213,223],{},[26,214,215],{},[29,216,217,219,221],{},[32,218],{},[32,220,36],{},[32,222,207],{},[41,224,225,234,245,256,267,278,287,295,304],{},[29,226,227,229,231],{},[46,228,48],{},[46,230,51],{},[46,232,233],{},"Free and open source",[29,235,236,239,242],{},[46,237,238],{},"Main job",[46,240,241],{},"Convert, compress and resize",[46,243,244],{},"Optimize files in their current format",[29,246,247,250,253],{},[46,248,249],{},"Input formats",[46,251,252],{},"More than 50, among them HEIC, WebP, AVIF, RAW",[46,254,255],{},"PNG, JPEG, GIF, SVG",[29,257,258,261,264],{},[46,259,260],{},"Output formats",[46,262,263],{},"More than 20, among them WebP, AVIF, HEIC",[46,265,266],{},"The same format as the input",[29,268,269,272,275],{},[46,270,271],{},"Original files",[46,273,274],{},"Kept. Kompressor asks before it replaces a file",[46,276,277],{},"Replaced by the optimized files. The originals go to the Trash",[29,279,280,282,284],{},[46,281,92],{},[46,283,95],{},[46,285,286],{},"No preview",[29,288,289,291,293],{},[46,290,103],{},[46,292,62],{},[46,294,65],{},[29,296,297,299,302],{},[46,298,114],{},[46,300,301],{},"Yes, by default",[46,303,301],{},[29,305,306,309,312],{},[46,307,308],{},"System",[46,310,311],{},"macOS 14 or later (macOS 13 from the Mac App Store)",[46,313,314],{},"macOS 11 or later",[10,316,318],{"id":317},"what-imageoptim-does-well","What ImageOptim does well",[15,320,321],{},"ImageOptim combines several open-source optimizers, among them MozJPEG, pngquant, Pngcrush, Zopfli and SVGO, and keeps the smallest result. By default it is lossless: the pixels stay the same and only the file becomes smaller. It is free, simple and very good at this job. If your website must stay with PNG and JPEG files, ImageOptim is the correct tool.",[10,323,325],{"id":324},"when-kompressor-is-the-better-tool","When Kompressor is the better tool",[133,327,328,338,344,350,356],{},[136,329,330,333,334,337],{},[139,331,332],{},"You want a modern format."," A change of format saves much more than an optimization. In our test, 30 PNG files became ",[144,335,336],{"href":146},"93% smaller as WebP",". ImageOptim does not write WebP, AVIF or HEIC.",[136,339,340,343],{},[139,341,342],{},"Your images are HEIC or RAW files."," ImageOptim does not read them.",[136,345,346,349],{},[139,347,348],{},"You want to see the result first."," Kompressor shows the original next to the result with the real file size.",[136,351,352,355],{},[139,353,354],{},"You want to keep your originals in place."," ImageOptim saves the optimized image over the original file and moves the original to the Trash. Kompressor writes new files and asks before it replaces an existing file.",[136,357,358,361],{},[139,359,360],{},"You need a different pixel size."," ImageOptim does not resize.",{"title":173,"searchDepth":174,"depth":174,"links":363},[364,365,366,367],{"id":12,"depth":174,"text":13},{"id":20,"depth":174,"text":21},{"id":317,"depth":174,"text":318},{"id":324,"depth":174,"text":325},"ImageOptim makes PNG and JPEG files smaller without a format change. Kompressor converts between formats. This is how the two Mac apps differ and when to use which.",{},"Kompressor vs ImageOptim","/compare/kompressor-vs-imageoptim",{"title":194,"description":368},{"loc":371,"lastmod":188},"compare/kompressor-vs-imageoptim","aeZXHXsMrhvm9FKqesgwTVa3wqQV2QPf8SZQ53WpbFk",{"id":4,"title":5,"body":377,"description":180,"extension":181,"meta":489,"name":183,"navigation":184,"path":185,"seo":490,"sitemap":491,"stem":189,"__hash__":190},{"type":7,"value":378,"toc":483},[379,381,383,385,455,457,459,461],[10,380,13],{"id":12},[15,382,17],{},[10,384,21],{"id":20},[23,386,387,397],{},[26,388,389],{},[29,390,391,393,395],{},[32,392],{},[32,394,36],{},[32,396,39],{},[41,398,399,407,415,423,431,439,447],{},[29,400,401,403,405],{},[46,402,48],{},[46,404,51],{},[46,406,54],{},[29,408,409,411,413],{},[46,410,59],{},[46,412,62],{},[46,414,65],{},[29,416,417,419,421],{},[46,418,70],{},[46,420,73],{},[46,422,76],{},[29,424,425,427,429],{},[46,426,81],{},[46,428,84],{},[46,430,87],{},[29,432,433,435,437],{},[46,434,92],{},[46,436,95],{},[46,438,98],{},[29,440,441,443,445],{},[46,442,103],{},[46,444,106],{},[46,446,109],{},[29,448,449,451,453],{},[46,450,114],{},[46,452,117],{},[46,454,120],{},[10,456,124],{"id":123},[15,458,127],{},[10,460,131],{"id":130},[133,462,463,469,473,477],{},[136,464,465,142,467,148],{},[139,466,141],{},[144,468,147],{"href":146},[136,470,471,154],{},[139,472,153],{},[136,474,475,160],{},[139,476,159],{},[136,478,479,166,481,171],{},[139,480,165],{},[168,482,170],{},{"title":173,"searchDepth":174,"depth":174,"links":484},[485,486,487,488],{"id":12,"depth":174,"text":13},{"id":20,"depth":174,"text":21},{"id":123,"depth":174,"text":124},{"id":130,"depth":174,"text":131},{},{"title":5,"description":180},{"loc":185,"lastmod":188},{"id":493,"title":494,"body":495,"description":640,"extension":181,"meta":641,"name":642,"navigation":184,"path":643,"seo":644,"sitemap":645,"stem":646,"__hash__":647},"compare/compare/kompressor-vs-squoosh.md","Kompressor Vs Squoosh",{"type":7,"value":496,"toc":634},[497,499,507,509,600,604,607,609],[10,498,13],{"id":12},[15,500,501,506],{},[144,502,505],{"href":503,"rel":504},"https://squoosh.app",[206],"Squoosh"," is an excellent free tool for one image. It runs in the browser and gives you many expert settings. Kompressor is the better tool when you have more than a few images, because Squoosh processes one image at a time.",[10,508,21],{"id":20},[23,510,511,521],{},[26,512,513],{},[29,514,515,517,519],{},[32,516],{},[32,518,36],{},[32,520,505],{},[41,522,523,531,542,551,559,569,580,589],{},[29,524,525,527,529],{},[46,526,48],{},[46,528,51],{},[46,530,233],{},[29,532,533,536,539],{},[46,534,535],{},"Type",[46,537,538],{},"Mac app",[46,540,541],{},"Web app in the browser",[29,543,544,546,548],{},[46,545,70],{},[46,547,73],{},[46,549,550],{},"One image at a time",[29,552,553,555,557],{},[46,554,92],{},[46,556,95],{},[46,558,95],{},[29,560,561,563,566],{},[46,562,260],{},[46,564,565],{},"More than 20, among them JPEG, PNG, WebP, AVIF, HEIC",[46,567,568],{},"MozJPEG, OxiPNG, WebP, AVIF, JPEG XL and more",[29,570,571,574,577],{},[46,572,573],{},"Encoder settings",[46,575,576],{},"Quality, size, metadata",[46,578,579],{},"Many expert settings for each encoder",[29,581,582,585,587],{},[46,583,584],{},"Images stay on your device",[46,586,62],{},[46,588,62],{},[29,590,591,594,597],{},[46,592,593],{},"Analytics",[46,595,596],{},"None",[46,598,599],{},"Google Analytics",[10,601,603],{"id":602},"what-squoosh-does-well","What Squoosh does well",[15,605,606],{},"Squoosh was made by the Google Chrome team to show what modern image formats can do. It compresses the image in your browser and does not send it to a server. You see the original and the result side by side, and you can change each detail of the encoder. It works on each operating system, and it costs nothing. For a single hero image where each kilobyte is important, Squoosh is hard to beat.",[10,608,325],{"id":324},[133,610,611,617,622,628],{},[136,612,613,616],{},[139,614,615],{},"You have many images."," Squoosh has no batch mode. In Kompressor you drop a folder and all images are converted.",[136,618,619,621],{},[139,620,342],{}," Kompressor reads all formats that macOS reads, among them iPhone HEIC photos and camera RAW files. Squoosh has no decoder for RAW files, and it opens HEIC files only in a browser that can decode them.",[136,623,624,627],{},[139,625,626],{},"You want no tracking at all."," Squoosh does not upload your images, but it uses Google Analytics. Kompressor has no analytics and works with no internet connection.",[136,629,630,633],{},[139,631,632],{},"You want a fast result."," Kompressor has three controls: format, quality and size.",{"title":173,"searchDepth":174,"depth":174,"links":635},[636,637,638,639],{"id":12,"depth":174,"text":13},{"id":20,"depth":174,"text":21},{"id":602,"depth":174,"text":603},{"id":324,"depth":174,"text":325},"Squoosh is a free web app from Google that compresses one image at a time. Kompressor is a Mac app for batches and folders. This is how they differ.",{},"Kompressor vs Squoosh","/compare/kompressor-vs-squoosh",{"title":494,"description":640},{"loc":643,"lastmod":188},"compare/kompressor-vs-squoosh","veJcCinKORwGEsjqvdJw1i68y9EWKzZU0PTEoDuktUc",{"id":649,"title":650,"body":651,"description":788,"extension":181,"meta":789,"name":790,"navigation":184,"path":791,"seo":792,"sitemap":793,"stem":795,"__hash__":796},"compare/compare/kompressor-vs-xnconvert.md","Kompressor Vs Xnconvert",{"type":7,"value":652,"toc":782},[653,655,663,665,747,751,754,756],[10,654,13],{"id":12},[15,656,657,662],{},[144,658,661],{"href":659,"rel":660},"https://www.xnview.com/en/xnconvert/",[206],"XnConvert"," can do much more than Kompressor: watermarks, crops, color changes and filters, on Windows, Mac and Linux. Kompressor does one job, to convert, compress and resize images on a Mac, and it makes that job fast and simple.",[10,664,21],{"id":20},[23,666,667,677],{},[26,668,669],{},[29,670,671,673,675],{},[32,672],{},[32,674,36],{},[32,676,661],{},[41,678,679,688,698,708,718,727,738],{},[29,680,681,683,685],{},[46,682,48],{},[46,684,51],{},[46,686,687],{},"Free for private use, from €15 for companies",[29,689,690,693,695],{},[46,691,692],{},"Systems",[46,694,311],{},[46,696,697],{},"Windows, Mac, Linux",[29,699,700,702,705],{},[46,701,249],{},[46,703,704],{},"More than 50",[46,706,707],{},"More than 500",[29,709,710,712,715],{},[46,711,260],{},[46,713,714],{},"More than 20",[46,716,717],{},"About 70",[29,719,720,722,725],{},[46,721,70],{},[46,723,724],{},"Yes, files and folders",[46,726,724],{},[29,728,729,732,735],{},[46,730,731],{},"Actions",[46,733,734],{},"Convert, compress, resize, remove metadata",[46,736,737],{},"More than 80, such as crop, watermark, filters",[29,739,740,743,745],{},[46,741,742],{},"Presets and watch folders",[46,744,65],{},[46,746,62],{},[10,748,750],{"id":749},"what-xnconvert-does-well","What XnConvert does well",[15,752,753],{},"XnConvert is a tool for image pipelines. You build a list of actions, for example resize, add a watermark and sharpen, save it as a preset and apply it to thousands of files. It can watch a folder and process new images automatically. It reads more than 500 formats, among them many old and rare ones. For private use it is free.",[10,755,325],{"id":324},[133,757,758,764,770,776],{},[136,759,760,763],{},[139,761,762],{},"You want a result, not a pipeline."," Drop the images, select a format, press play. There is nothing to configure first.",[136,765,766,769],{},[139,767,768],{},"The file size is important."," Kompressor shows the original next to the compressed result with the real file size before you convert, so you find the correct quality at once.",[136,771,772,775],{},[139,773,774],{},"You want a Mac app."," Kompressor is made only for macOS, with drag and drop, the Services menu and the look of a Mac app.",[136,777,778,781],{},[139,779,780],{},"You use it at work."," XnConvert needs a paid license for use in a company. The Kompressor license costs about the same and is a one-time payment.",{"title":173,"searchDepth":174,"depth":174,"links":783},[784,785,786,787],{"id":12,"depth":174,"text":13},{"id":20,"depth":174,"text":21},{"id":749,"depth":174,"text":750},{"id":324,"depth":174,"text":325},"XnConvert is a powerful batch converter with more than 80 actions. Kompressor is a simple Mac app with a live preview. This is how they differ and when to use which.",{},"Kompressor vs XnConvert","/compare/kompressor-vs-xnconvert",{"title":650,"description":788},{"loc":791,"lastmod":794},"2026-11-11","compare/kompressor-vs-xnconvert","BExokzHrAfQeQtO4H_HeaebIqwWhvnjwqh3tURjijUg",1794363296680]