[{"data":1,"prerenderedAt":895},["ShallowReactive",2],{"guide-xml-vs-json":3},{"id":4,"title":5,"body":6,"date":886,"description":887,"extension":888,"meta":889,"navigation":890,"path":891,"readingTime":93,"seo":892,"stem":893,"__hash__":894},"guides\u002Fguides\u002Fxml-vs-json.md","XML vs JSON - When to Use Each Data Format",{"type":7,"value":8,"toc":870},"minimark",[9,14,18,21,25,28,33,150,154,212,223,227,347,351,354,396,448,453,457,460,504,539,544,548,551,610,613,617,620,678,681,685,688,717,721,809,815,819,822,839,843,866],[10,11,13],"h2",{"id":12},"xml-vs-json-which-format-should-you-use","XML vs JSON — Which Format Should You Use?",[15,16,17],"p",{},"XML (Extensible Markup Language) and JSON (JavaScript Object Notation) are the two most widely used formats for structuring and exchanging data. Both are plain text, both are human-readable, and both work with every major programming language.",[15,19,20],{},"But they are not interchangeable. Each format has strengths that make it a better fit for specific tasks. This guide breaks down the key differences so you can choose with confidence.",[10,22,24],{"id":23},"syntax-comparison","Syntax Comparison",[15,26,27],{},"The most visible difference is syntax. JSON uses braces, brackets, and key-value pairs. XML uses angle brackets with opening and closing tags.",[29,30,32],"h3",{"id":31},"same-data-in-json","Same Data in JSON",[34,35,40],"pre",{"className":36,"code":37,"language":38,"meta":39,"style":39},"language-json shiki shiki-themes github-light github-dark","{\n  \"book\": {\n    \"id\": 1,\n    \"title\": \"Clean Code\",\n    \"author\": \"Robert C. Martin\",\n    \"price\": 35.99,\n    \"tags\": [\"programming\", \"best practices\"]\n  }\n}\n","json","",[41,42,43,52,62,77,91,104,117,138,144],"code",{"__ignoreMap":39},[44,45,48],"span",{"class":46,"line":47},"line",1,[44,49,51],{"class":50},"sVt8B","{\n",[44,53,55,59],{"class":46,"line":54},2,[44,56,58],{"class":57},"sj4cs","  \"book\"",[44,60,61],{"class":50},": {\n",[44,63,65,68,71,74],{"class":46,"line":64},3,[44,66,67],{"class":57},"    \"id\"",[44,69,70],{"class":50},": ",[44,72,73],{"class":57},"1",[44,75,76],{"class":50},",\n",[44,78,80,83,85,89],{"class":46,"line":79},4,[44,81,82],{"class":57},"    \"title\"",[44,84,70],{"class":50},[44,86,88],{"class":87},"sZZnC","\"Clean Code\"",[44,90,76],{"class":50},[44,92,94,97,99,102],{"class":46,"line":93},5,[44,95,96],{"class":57},"    \"author\"",[44,98,70],{"class":50},[44,100,101],{"class":87},"\"Robert C. Martin\"",[44,103,76],{"class":50},[44,105,107,110,112,115],{"class":46,"line":106},6,[44,108,109],{"class":57},"    \"price\"",[44,111,70],{"class":50},[44,113,114],{"class":57},"35.99",[44,116,76],{"class":50},[44,118,120,123,126,129,132,135],{"class":46,"line":119},7,[44,121,122],{"class":57},"    \"tags\"",[44,124,125],{"class":50},": [",[44,127,128],{"class":87},"\"programming\"",[44,130,131],{"class":50},", ",[44,133,134],{"class":87},"\"best practices\"",[44,136,137],{"class":50},"]\n",[44,139,141],{"class":46,"line":140},8,[44,142,143],{"class":50},"  }\n",[44,145,147],{"class":46,"line":146},9,[44,148,149],{"class":50},"}\n",[29,151,153],{"id":152},"same-data-in-xml","Same Data in XML",[34,155,159],{"className":156,"code":157,"language":158,"meta":39,"style":39},"language-xml shiki shiki-themes github-light github-dark","\u003C?xml version=\"1.0\" encoding=\"UTF-8\"?>\n\u003Cbook id=\"1\">\n  \u003Ctitle>Clean Code\u003C\u002Ftitle>\n  \u003Cauthor>Robert C. Martin\u003C\u002Fauthor>\n  \u003Cprice currency=\"USD\">35.99\u003C\u002Fprice>\n  \u003Ctags>\n    \u003Ctag>programming\u003C\u002Ftag>\n    \u003Ctag>best practices\u003C\u002Ftag>\n  \u003C\u002Ftags>\n\u003C\u002Fbook>\n","xml",[41,160,161,166,171,176,181,186,191,196,201,206],{"__ignoreMap":39},[44,162,163],{"class":46,"line":47},[44,164,165],{},"\u003C?xml version=\"1.0\" encoding=\"UTF-8\"?>\n",[44,167,168],{"class":46,"line":54},[44,169,170],{},"\u003Cbook id=\"1\">\n",[44,172,173],{"class":46,"line":64},[44,174,175],{},"  \u003Ctitle>Clean Code\u003C\u002Ftitle>\n",[44,177,178],{"class":46,"line":79},[44,179,180],{},"  \u003Cauthor>Robert C. Martin\u003C\u002Fauthor>\n",[44,182,183],{"class":46,"line":93},[44,184,185],{},"  \u003Cprice currency=\"USD\">35.99\u003C\u002Fprice>\n",[44,187,188],{"class":46,"line":106},[44,189,190],{},"  \u003Ctags>\n",[44,192,193],{"class":46,"line":119},[44,194,195],{},"    \u003Ctag>programming\u003C\u002Ftag>\n",[44,197,198],{"class":46,"line":140},[44,199,200],{},"    \u003Ctag>best practices\u003C\u002Ftag>\n",[44,202,203],{"class":46,"line":146},[44,204,205],{},"  \u003C\u002Ftags>\n",[44,207,209],{"class":46,"line":208},10,[44,210,211],{},"\u003C\u002Fbook>\n",[15,213,214,215,218,219,222],{},"Notice how XML uses ",[41,216,217],{},"id=\"1\""," as an attribute — something JSON cannot do. XML also supports ",[41,220,221],{},"currency=\"USD\""," on the price element, mixing metadata with content in a way JSON cannot replicate without extra nesting.",[10,224,226],{"id":225},"key-differences-at-a-glance","Key Differences at a Glance",[228,229,230,246],"table",{},[231,232,233],"thead",{},[234,235,236,240,243],"tr",{},[237,238,239],"th",{},"Feature",[237,241,242],{},"JSON",[237,244,245],{},"XML",[247,248,249,261,272,287,299,309,322,333],"tbody",{},[234,250,251,255,258],{},[252,253,254],"td",{},"Syntax style",[252,256,257],{},"Key-value pairs with braces",[252,259,260],{},"Opening\u002Fclosing tags with angle brackets",[234,262,263,266,269],{},[252,264,265],{},"Data types",[252,267,268],{},"Native (string, number, boolean, null, array, object)",[252,270,271],{},"String only — application must convert",[234,273,274,277,280],{},[252,275,276],{},"Comments",[252,278,279],{},"Not supported",[252,281,282,283,286],{},"Supported (",[41,284,285],{},"\u003C!-- comment -->",")",[234,288,289,292,294],{},[252,290,291],{},"Attributes",[252,293,279],{},[252,295,282,296,286],{},[41,297,298],{},"\u003Ctag attr=\"value\">",[234,300,301,304,306],{},[252,302,303],{},"Namespaces",[252,305,279],{},[252,307,308],{},"Supported (prevents naming conflicts)",[234,310,311,314,317],{},[252,312,313],{},"Self-closing tags",[252,315,316],{},"Not needed",[252,318,282,319,286],{},[41,320,321],{},"\u003Ctag\u002F>",[234,323,324,327,330],{},[252,325,326],{},"File size (same data)",[252,328,329],{},"20–50% smaller",[252,331,332],{},"Larger due to tag overhead",[234,334,335,338,344],{},[252,336,337],{},"Parse speed (JS)",[252,339,340,341,286],{},"Native (",[41,342,343],{},"JSON.parse",[252,345,346],{},"Requires DOM parser",[10,348,350],{"id":349},"when-to-choose-json","When to Choose JSON",[15,352,353],{},"JSON is the right choice for most modern web development:",[355,356,357,365,371,377,390],"ul",{},[358,359,360,364],"li",{},[361,362,363],"strong",{},"REST APIs"," — Nearly all public APIs use JSON as the default response format. It integrates seamlessly with JavaScript frontends.",[358,366,367,370],{},[361,368,369],{},"Single-page applications"," — Frameworks like Vue, React, and Angular consume JSON natively.",[358,372,373,376],{},[361,374,375],{},"Mobile backends"," — Smaller payloads mean faster responses on limited bandwidth.",[358,378,379,382,383,131,386,389],{},[361,380,381],{},"Configuration files"," — ",[41,384,385],{},"package.json",[41,387,388],{},"tsconfig.json",", and similar files prefer JSON for its simplicity.",[358,391,392,395],{},[361,393,394],{},"Database storage"," — MongoDB, PostgreSQL JSONB, and other databases store and query JSON directly.",[34,397,401],{"className":398,"code":399,"language":400,"meta":39,"style":39},"language-javascript shiki shiki-themes github-light github-dark","\u002F\u002F Parsing JSON is instant in JavaScript\nconst data = JSON.parse(responseBody);\nconsole.log(data.book.title); \u002F\u002F \"Clean Code\"\n","javascript",[41,402,403,409,434],{"__ignoreMap":39},[44,404,405],{"class":46,"line":47},[44,406,408],{"class":407},"sJ8bj","\u002F\u002F Parsing JSON is instant in JavaScript\n",[44,410,411,415,418,421,424,427,431],{"class":46,"line":54},[44,412,414],{"class":413},"szBVR","const",[44,416,417],{"class":57}," data",[44,419,420],{"class":413}," =",[44,422,423],{"class":57}," JSON",[44,425,426],{"class":50},".",[44,428,430],{"class":429},"sScJk","parse",[44,432,433],{"class":50},"(responseBody);\n",[44,435,436,439,442,445],{"class":46,"line":64},[44,437,438],{"class":50},"console.",[44,440,441],{"class":429},"log",[44,443,444],{"class":50},"(data.book.title); ",[44,446,447],{"class":407},"\u002F\u002F \"Clean Code\"\n",[15,449,450],{},[361,451,452],{},"JSON wins because it is simple, small, and native to the language that runs the web.",[10,454,456],{"id":455},"when-to-choose-xml","When to Choose XML",[15,458,459],{},"XML still excels in specific domains:",[355,461,462,468,481,487,492,498],{},[358,463,464,467],{},[361,465,466],{},"SOAP web services"," — Enterprise systems and legacy APIs require XML-based SOAP envelopes.",[358,469,470,473,474,131,477,480],{},[361,471,472],{},"Document formats"," — Microsoft Office files (",[41,475,476],{},".docx",[41,478,479],{},".xlsx","), SVG images, and XHTML are all XML-based.",[358,482,483,486],{},[361,484,485],{},"Attributes and metadata"," — XML attributes let you attach metadata to elements without extra nesting.",[358,488,489,491],{},[361,490,303],{}," — When combining data from different vocabularies, XML namespaces prevent naming conflicts.",[358,493,494,497],{},[361,495,496],{},"Mixed content"," — Elements that contain both text and child elements work naturally in XML but require awkward workarounds in JSON.",[358,499,500,503],{},[361,501,502],{},"Schema validation"," — XSD provides richer validation than JSON Schema, including cross-element constraints and built-in data types.",[34,505,507],{"className":156,"code":506,"language":158,"meta":39,"style":39},"\u003Ccatalog xmlns:dc=\"http:\u002F\u002Fpurl.org\u002Fdc\u002Felements\u002F1.1\u002F\">\n  \u003Cbook dc:id=\"1\">\n    \u003Cdc:title>Data Formats\u003C\u002Fdc:title>\n    \u003Cprice currency=\"USD\">29.99\u003C\u002Fprice>\n  \u003C\u002Fbook>\n\u003C\u002Fcatalog>\n",[41,508,509,514,519,524,529,534],{"__ignoreMap":39},[44,510,511],{"class":46,"line":47},[44,512,513],{},"\u003Ccatalog xmlns:dc=\"http:\u002F\u002Fpurl.org\u002Fdc\u002Felements\u002F1.1\u002F\">\n",[44,515,516],{"class":46,"line":54},[44,517,518],{},"  \u003Cbook dc:id=\"1\">\n",[44,520,521],{"class":46,"line":64},[44,522,523],{},"    \u003Cdc:title>Data Formats\u003C\u002Fdc:title>\n",[44,525,526],{"class":46,"line":79},[44,527,528],{},"    \u003Cprice currency=\"USD\">29.99\u003C\u002Fprice>\n",[44,530,531],{"class":46,"line":93},[44,532,533],{},"  \u003C\u002Fbook>\n",[44,535,536],{"class":46,"line":106},[44,537,538],{},"\u003C\u002Fcatalog>\n",[15,540,541],{},[361,542,543],{},"XML wins where documents matter more than data, and where enterprise-grade validation is non-negotiable.",[10,545,547],{"id":546},"performance-and-size","Performance and Size",[15,549,550],{},"For identical data, JSON is consistently smaller and faster to parse:",[228,552,553,564],{},[231,554,555],{},[234,556,557,560,562],{},[237,558,559],{},"Metric",[237,561,242],{},[237,563,245],{},[247,565,566,577,588,599],{},[234,567,568,571,574],{},[252,569,570],{},"Typical file size",[252,572,573],{},"Baseline",[252,575,576],{},"20–50% larger",[234,578,579,582,585],{},[252,580,581],{},"Parse speed (JavaScript)",[252,583,584],{},"Native — fastest",[252,586,587],{},"DOM parser — slower",[234,589,590,593,596],{},[252,591,592],{},"Memory usage",[252,594,595],{},"Lower",[252,597,598],{},"Higher",[234,600,601,604,607],{},[252,602,603],{},"Streaming parsing",[252,605,606],{},"Limited",[252,608,609],{},"Good (SAX processes incrementally)",[15,611,612],{},"XML wins one area: streaming. SAX parsers process documents incrementally without loading the entire file into memory. This matters for files in the hundreds of megabytes. JSON streaming solutions exist but are less mature.",[10,614,616],{"id":615},"schema-and-validation","Schema and Validation",[15,618,619],{},"Both formats support validation, but XSD is more powerful:",[228,621,622,634],{},[231,623,624],{},[234,625,626,628,631],{},[237,627,239],{},[237,629,630],{},"JSON Schema",[237,632,633],{},"XSD",[247,635,636,646,656,667],{},[234,637,638,640,643],{},[252,639,265],{},[252,641,642],{},"Basic (6 types)",[252,644,645],{},"Rich (integer, decimal, date, duration, etc.)",[234,647,648,651,653],{},[252,649,650],{},"Cross-field rules",[252,652,606],{},[252,654,655],{},"Full support",[234,657,658,661,664],{},[252,659,660],{},"Namespace support",[252,662,663],{},"No",[252,665,666],{},"Yes",[234,668,669,672,675],{},[252,670,671],{},"Maturity",[252,673,674],{},"Draft stage (evolving)",[252,676,677],{},"W3C Recommendation (stable since 2004)",[15,679,680],{},"For simple validation, JSON Schema works fine. For complex enterprise rules with cross-element dependencies, XSD is the stronger choice.",[10,682,684],{"id":683},"conversion-gotchas","Conversion Gotchas",[15,686,687],{},"Converting between formats is common but tricky:",[355,689,690,700,706,711],{},[358,691,692,695,696,699],{},[361,693,694],{},"XML attributes"," usually map to a ",[41,697,698],{},"@attributes"," key in JSON — a convention, not a standard.",[358,701,702,705],{},[361,703,704],{},"XML namespaces"," have no JSON equivalent — they get dropped or flattened.",[358,707,708,710],{},[361,709,496],{}," (text mixed with child elements) is awkward in JSON.",[358,712,713,716],{},[361,714,715],{},"Single vs. multiple children"," — one XML child becomes a JSON object; multiple become an array. This inconsistency causes frequent bugs.",[10,718,720],{"id":719},"decision-guide","Decision Guide",[228,722,723,733],{},[231,724,725],{},[234,726,727,730],{},[237,728,729],{},"Scenario",[237,731,732],{},"Recommendation",[247,734,735,744,753,762,771,780,790,800],{},[234,736,737,740],{},[252,738,739],{},"Public REST API",[252,741,742],{},[361,743,242],{},[234,745,746,749],{},[252,747,748],{},"Browser-based frontend",[252,750,751],{},[361,752,242],{},[234,754,755,758],{},[252,756,757],{},"Mobile backend",[252,759,760],{},[361,761,242],{},[234,763,764,767],{},[252,765,766],{},"SOAP \u002F enterprise service",[252,768,769],{},[361,770,245],{},[234,772,773,776],{},[252,774,775],{},"Document format (Office, SVG)",[252,777,778],{},[361,779,245],{},[234,781,782,785],{},[252,783,784],{},"Large file streaming",[252,786,787,789],{},[361,788,245],{}," (SAX)",[234,791,792,795],{},[252,793,794],{},"Strong validation needed",[252,796,797,799],{},[361,798,245],{}," (XSD)",[234,801,802,805],{},[252,803,804],{},"Bandwidth is critical",[252,806,807],{},[361,808,242],{},[15,810,811,814],{},[361,812,813],{},"Quick rule:"," If machines write and read it, JSON is simpler and leaner. If humans author it or documents are the focus, XML (or YAML) offers more expressive power.",[10,816,818],{"id":817},"try-it-yourself","Try It Yourself",[15,820,821],{},"Working with both formats? These tools save time:",[355,823,824,832],{},[358,825,826,831],{},[827,828,830],"a",{"href":829},"\u002Ftools\u002Fxml-formatter","XML Formatter"," — Format, minify, and validate XML instantly",[358,833,834,838],{},[827,835,837],{"href":836},"\u002Ftools\u002Fjson-formatter","JSON Formatter"," — Pretty-print, validate, and minify JSON data",[10,840,842],{"id":841},"related-guides","Related Guides",[355,844,845,852,859],{},[358,846,847,851],{},[827,848,850],{"href":849},"\u002Fguides\u002Fxml-formatter-guide","XML Formatter Guide"," — Detailed walkthrough of formatting and validating XML",[358,853,854,858],{},[827,855,857],{"href":856},"\u002Fguides\u002Fdata-formatting-tools","Data Formatting Tools"," — Essential tools for formatting code and data",[358,860,861,865],{},[827,862,864],{"href":863},"\u002Fguides\u002Fjson-vs-xml","JSON vs XML"," — In-depth comparison with parsing examples and security considerations",[867,868,869],"style",{},"html pre.shiki code .sVt8B, html code.shiki .sVt8B{--shiki-default:#24292E;--shiki-dark:#E1E4E8}html pre.shiki code .sj4cs, html code.shiki .sj4cs{--shiki-default:#005CC5;--shiki-dark:#79B8FF}html pre.shiki code .sZZnC, html code.shiki .sZZnC{--shiki-default:#032F62;--shiki-dark:#9ECBFF}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html pre.shiki code .sJ8bj, html code.shiki .sJ8bj{--shiki-default:#6A737D;--shiki-dark:#6A737D}html pre.shiki code .szBVR, html code.shiki .szBVR{--shiki-default:#D73A49;--shiki-dark:#F97583}html pre.shiki code .sScJk, html code.shiki .sScJk{--shiki-default:#6F42C1;--shiki-dark:#B392F0}",{"title":39,"searchDepth":54,"depth":54,"links":871},[872,873,877,878,879,880,881,882,883,884,885],{"id":12,"depth":54,"text":13},{"id":23,"depth":54,"text":24,"children":874},[875,876],{"id":31,"depth":64,"text":32},{"id":152,"depth":64,"text":153},{"id":225,"depth":54,"text":226},{"id":349,"depth":54,"text":350},{"id":455,"depth":54,"text":456},{"id":546,"depth":54,"text":547},{"id":615,"depth":54,"text":616},{"id":683,"depth":54,"text":684},{"id":719,"depth":54,"text":720},{"id":817,"depth":54,"text":818},{"id":841,"depth":54,"text":842},"2026-05-28","Compare XML and JSON data formats. Learn when to use XML vs JSON for your web development projects.","md",{"immutable":890},true,"\u002Fguides\u002Fxml-vs-json",{"title":5,"description":887},"guides\u002Fxml-vs-json","_WgRa8wmFUIfoOUoIigss25cwwkVHEAtCePFIHVD9xc",1780401330257]