What is CSV to JSON conversion?

CSV to JSON conversion is the process of transforming data from Comma-Separated Values (CSV) format to JavaScript Object Notation (JSON) format. This is useful for web applications that need to process tabular data in a more structured format.

How does the CSV to JSON converter work?

Our converter takes your CSV input, parses it line by line, and converts each row into a JSON object. The first line of your CSV is used as the keys for the JSON objects, and each subsequent line becomes a value object.

Is my data secure when using this converter?

Yes, all conversion happens directly in your browser. Your data never leaves your computer and is not sent to any server, ensuring complete privacy and security.

Can I convert large CSV files?

Yes, our converter can handle reasonably large files, but extremely large files might slow down your browser as processing happens client-side. For very large files, we recommend using dedicated software.

Converters

CSV to JSON Converter | Free 100%

CSV to JSON Converter | Free Online Tool

CSV to JSON Converter

Convert your CSV data to JSON format quickly and easily

Input CSV

Upload CSV File

Output JSON

Tip

You can copy the JSON output and use it directly in your JavaScript applications or APIs.

Error

Rate this tool:

Converters

You may like these posts

window['__wavt'] = 'AOuZoY4RfmZDFE6rKQUOyXOGf_0OBtgBKw:1757104462742';_WidgetManager._Init('//www.blogger.com/rearrange?blogID\x3d1959473607919597673','//www.calcsphere.com/2025/09/csv-to-json-converter-free-100.html','1959473607919597673'); _WidgetManager._SetDataContext([{'name': 'blog', 'data': {'blogId': '1959473607919597673', 'title': 'Calcsphere - All calculators in one place', 'url': 'https://www.calcsphere.com/2025/09/csv-to-json-converter-free-100.html', 'canonicalUrl': 'https://www.calcsphere.com/2025/09/csv-to-json-converter-free-100.html', 'homepageUrl': 'https://www.calcsphere.com/', 'searchUrl': 'https://www.calcsphere.com/search', 'canonicalHomepageUrl': 'https://www.calcsphere.com/', 'blogspotFaviconUrl': 'https://www.calcsphere.com/favicon.ico', 'bloggerUrl': 'https://www.blogger.com', 'hasCustomDomain': true, 'httpsEnabled': true, 'enabledCommentProfileImages': true, 'gPlusViewType': 'FILTERED_POSTMOD', 'adultContent': false, 'analyticsAccountNumber': '', 'encoding': 'UTF-8', 'locale': 'en', 'localeUnderscoreDelimited': 'en', 'languageDirection': 'ltr', 'isPrivate': false, 'isMobile': false, 'isMobileRequest': false, 'mobileClass': '', 'isPrivateBlog': false, 'isDynamicViewsAvailable': true, 'feedLinks': '\x3clink rel\x3d\x22alternate\x22 type\x3d\x22application/atom+xml\x22 title\x3d\x22Calcsphere - All calculators in one place - Atom\x22 href\x3d\x22https://www.calcsphere.com/feeds/posts/default\x22 /\x3e\n\x3clink rel\x3d\x22alternate\x22 type\x3d\x22application/rss+xml\x22 title\x3d\x22Calcsphere - All calculators in one place - RSS\x22 href\x3d\x22https://www.calcsphere.com/feeds/posts/default?alt\x3drss\x22 /\x3e\n\x3clink rel\x3d\x22service.post\x22 type\x3d\x22application/atom+xml\x22 title\x3d\x22Calcsphere - All calculators in one place - Atom\x22 href\x3d\x22https://www.blogger.com/feeds/1959473607919597673/posts/default\x22 /\x3e\n\n\x3clink rel\x3d\x22alternate\x22 type\x3d\x22application/atom+xml\x22 title\x3d\x22Calcsphere - All calculators in one place - Atom\x22 href\x3d\x22https://www.calcsphere.com/feeds/7425882696702387702/comments/default\x22 /\x3e\n', 'meTag': '', 'adsenseHostId': 'ca-host-pub-1556223355139109', 'adsenseHasAds': false, 'adsenseAutoAds': false, 'boqCommentIframeForm': true, 'loginRedirectParam': '', 'view': '', 'dynamicViewsCommentsSrc': '//www.blogblog.com/dynamicviews/4224c15c4e7c9321/js/comments.js', 'dynamicViewsScriptSrc': '//www.blogblog.com/dynamicviews/8768b2abe984dc7c', 'plusOneApiSrc': 'https://apis.google.com/js/platform.js', 'disableGComments': true, 'interstitialAccepted': false, 'sharing': {'platforms': [{'name': 'Get link', 'key': 'link', 'shareMessage': 'Get link', 'target': ''}, {'name': 'Facebook', 'key': 'facebook', 'shareMessage': 'Share to Facebook', 'target': 'facebook'}, {'name': 'BlogThis!', 'key': 'blogThis', 'shareMessage': 'BlogThis!', 'target': 'blog'}, {'name': 'X', 'key': 'twitter', 'shareMessage': 'Share to X', 'target': 'twitter'}, {'name': 'Pinterest', 'key': 'pinterest', 'shareMessage': 'Share to Pinterest', 'target': 'pinterest'}, {'name': 'Email', 'key': 'email', 'shareMessage': 'Email', 'target': 'email'}], 'disableGooglePlus': true, 'googlePlusShareButtonWidth': 0, 'googlePlusBootstrap': '\x3cscript type\x3d\x22text/javascript\x22\x3ewindow.___gcfg \x3d {\x27lang\x27: \x27en\x27};\x3c/script\x3e'}, 'hasCustomJumpLinkMessage': false, 'jumpLinkMessage': 'Read more', 'pageType': 'item', 'postId': '7425882696702387702', 'postImageThumbnailUrl': 'https://blogger.googleusercontent.com/img/a/AVvXsEhAQy98j_FHGCGvXv976xmcfNI8HrvSnXDVo4ekkkT44OvyK9_N39-mA8ebQTOos4M1K1JzIDvt-7rcux9aKy_QWRz7nelfcthlrpD6_PkxUzCHWX1jsdJdkVlQJDpc_9pKqlGA4_YB8dzU1n0IUdoc0H-wumSei3OKNxSQT_fNsQ0nU0BebhvrNYX4zj3a\x3ds72-w200-c-h100', 'postImageUrl': 'https://blogger.googleusercontent.com/img/a/AVvXsEhAQy98j_FHGCGvXv976xmcfNI8HrvSnXDVo4ekkkT44OvyK9_N39-mA8ebQTOos4M1K1JzIDvt-7rcux9aKy_QWRz7nelfcthlrpD6_PkxUzCHWX1jsdJdkVlQJDpc_9pKqlGA4_YB8dzU1n0IUdoc0H-wumSei3OKNxSQT_fNsQ0nU0BebhvrNYX4zj3a\x3dw200-h100', 'pageName': 'CSV to JSON Converter | Free 100%', 'pageTitle': 'Calcsphere - All calculators in one place: CSV to JSON Converter | Free 100%', 'metaDescription': ' CSV to JSON Converter\nConvert your CSV data to JSON format quickly and easily'}}, {'name': 'features', 'data': {}}, {'name': 'messages', 'data': {'edit': 'Edit', 'linkCopiedToClipboard': 'Link copied to clipboard!', 'ok': 'Ok', 'postLink': 'Post Link'}}, {'name': 'template', 'data': {'name': 'custom', 'localizedName': 'Custom', 'isResponsive': true, 'isAlternateRendering': false, 'isCustom': true}}, {'name': 'view', 'data': {'classic': {'name': 'classic', 'url': '?view\x3dclassic'}, 'flipcard': {'name': 'flipcard', 'url': '?view\x3dflipcard'}, 'magazine': {'name': 'magazine', 'url': '?view\x3dmagazine'}, 'mosaic': {'name': 'mosaic', 'url': '?view\x3dmosaic'}, 'sidebar': {'name': 'sidebar', 'url': '?view\x3dsidebar'}, 'snapshot': {'name': 'snapshot', 'url': '?view\x3dsnapshot'}, 'timeslide': {'name': 'timeslide', 'url': '?view\x3dtimeslide'}, 'isMobile': false, 'title': 'CSV to JSON Converter | Free 100%', 'description': ' CSV to JSON Converter\nConvert your CSV data to JSON format quickly and easily', 'featuredImage': 'https://blogger.googleusercontent.com/img/a/AVvXsEhAQy98j_FHGCGvXv976xmcfNI8HrvSnXDVo4ekkkT44OvyK9_N39-mA8ebQTOos4M1K1JzIDvt-7rcux9aKy_QWRz7nelfcthlrpD6_PkxUzCHWX1jsdJdkVlQJDpc_9pKqlGA4_YB8dzU1n0IUdoc0H-wumSei3OKNxSQT_fNsQ0nU0BebhvrNYX4zj3a\x3dw200-h100', 'url': 'https://www.calcsphere.com/2025/09/csv-to-json-converter-free-100.html', 'type': 'item', 'isSingleItem': true, 'isMultipleItems': false, 'isError': false, 'isPage': false, 'isPost': true, 'isHomepage': false, 'isArchive': false, 'isLabelSearch': false, 'postId': 7425882696702387702}}, {'name': 'widgets', 'data': [{'title': '', 'type': 'HTML', 'sectionId': 'TopPost-sc', 'id': 'HTML3'}, {'title': 'Calcsphere - All calculators in one place (Header)', 'type': 'Header', 'sectionId': 'logo', 'id': 'Header1'}, {'title': 'pages', 'type': 'PageList', 'sectionId': 'pages', 'id': 'PageList1'}, {'title': 'Main Menu', 'type': 'LinkList', 'sectionId': 'menu', 'id': 'LinkList001'}, {'title': 'Search ...', 'type': 'BlogSearch', 'sectionId': 'searchform', 'id': 'BlogSearch2'}, {'title': 'Also Like', 'type': 'Label', 'sectionId': 'searchform', 'id': 'Label002'}, {'title': 'Blog Posts', 'type': 'Blog', 'sectionId': 'Tempnec', 'id': 'Blog1', 'posts': [{'id': '7425882696702387702', 'title': 'CSV to JSON Converter | Free 100%', 'featuredImage': 'https://blogger.googleusercontent.com/img/a/AVvXsEhAQy98j_FHGCGvXv976xmcfNI8HrvSnXDVo4ekkkT44OvyK9_N39-mA8ebQTOos4M1K1JzIDvt-7rcux9aKy_QWRz7nelfcthlrpD6_PkxUzCHWX1jsdJdkVlQJDpc_9pKqlGA4_YB8dzU1n0IUdoc0H-wumSei3OKNxSQT_fNsQ0nU0BebhvrNYX4zj3a\x3dw200-h100', 'showInlineAds': false}], 'headerByline': {'regionName': 'header1', 'items': [{'name': 'share', 'label': ''}]}, 'footerBylines': [{'regionName': 'footer2', 'items': [{'name': 'labels', 'label': ''}]}], 'allBylineItems': [{'name': 'share', 'label': ''}, {'name': 'labels', 'label': ''}]}, {'title': 'Popular Calculators', 'type': 'PopularPosts', 'sectionId': 'sidepar', 'id': 'PopularPosts1', 'posts': [{'title': 'One Rep Max Calculator | Accurate Weightlifting Strength Measurement', 'id': 6524350873602475768}, {'title': 'Pregnancy Due Date Calculator | Conception or Last Period', 'id': 4305052106597463592}, {'title': 'Mortgage Calculator - Advanced Loan Estimator', 'id': 2599932060831909065}, {'title': 'IRA Calculator | Plan Your Retirement Savings', 'id': 6112624409665152579}, {'title': 'Fuel Cost Calculator for Road Trips (Distance + MPG + Gas Price)', 'id': 8955041499625069694}]}, {'title': 'Main Post Ads', 'type': 'LinkList', 'sectionId': 'PostA3lan', 'id': 'LinkList005'}, {'title': 'BlogArchive', 'type': 'BlogArchive', 'sectionId': 'sitting', 'id': 'BlogArchive400'}, {'title': 'BlogAuthors', 'type': 'Profile', 'sectionId': 'sitting', 'id': 'Profile400'}, {'title': 'Contact Form', 'type': 'ContactForm', 'sectionId': 'AddOns', 'id': 'ContactForm200'}]}]); _WidgetManager._RegisterWidget('_HTMLView', new _WidgetInfo('HTML3', 'TopPost-sc', document.getElementById('HTML3'), {}, 'displayModeFull')); _WidgetManager._RegisterWidget('_HeaderView', new _WidgetInfo('Header1', 'logo', document.getElementById('Header1'), {}, 'displayModeFull')); _WidgetManager._RegisterWidget('_PageListView', new _WidgetInfo('PageList1', 'pages', document.getElementById('PageList1'), {'title': 'pages', 'links': [{'isCurrentPage': false, 'href': 'https://www.calcsphere.com/p/privacy-policy.html', 'id': '4145942169882013337', 'title': 'Privacy Policy'}, {'isCurrentPage': false, 'href': 'https://www.calcsphere.com/p/terms-of-use.html', 'id': '1452744679266195630', 'title': 'Terms of Use'}, {'isCurrentPage': false, 'href': 'https://www.calcsphere.com/p/contact-us.html', 'id': '2876505636776768052', 'title': 'Contact Us'}], 'mobile': false, 'showPlaceholder': true, 'hasCurrentPage': false}, 'displayModeFull')); _WidgetManager._RegisterWidget('_LinkListView', new _WidgetInfo('LinkList001', 'menu', document.getElementById('LinkList001'), {}, 'displayModeFull')); _WidgetManager._RegisterWidget('_BlogSearchView', new _WidgetInfo('BlogSearch2', 'searchform', document.getElementById('BlogSearch2'), {}, 'displayModeFull')); _WidgetManager._RegisterWidget('_LabelView', new _WidgetInfo('Label002', 'searchform', document.getElementById('Label002'), {}, 'displayModeFull')); _WidgetManager._RegisterWidget('_BlogView', new _WidgetInfo('Blog1', 'Tempnec', document.getElementById('Blog1'), {'cmtInteractionsEnabled': false, 'lightboxEnabled': true, 'lightboxModuleUrl': 'https://www.blogger.com/static/v1/jsbin/3944273060-lbx.js', 'lightboxCssUrl': 'https://www.blogger.com/static/v1/v-css/123180807-lightbox_bundle.css'}, 'displayModeFull')); _WidgetManager._RegisterWidget('_PopularPostsView', new _WidgetInfo('PopularPosts1', 'sidepar', document.getElementById('PopularPosts1'), {}, 'displayModeFull')); _WidgetManager._RegisterWidget('_LinkListView', new _WidgetInfo('LinkList005', 'PostA3lan', document.getElementById('LinkList005'), {}, 'displayModeFull')); _WidgetManager._RegisterWidget('_BlogArchiveView', new _WidgetInfo('BlogArchive400', 'sitting', document.getElementById('BlogArchive400'), {'languageDirection': 'ltr', 'loadingMessage': 'Loading\x26hellip;'}, 'displayModeFull')); _WidgetManager._RegisterWidget('_ProfileView', new _WidgetInfo('Profile400', 'sitting', document.getElementById('Profile400'), {}, 'displayModeFull')); _WidgetManager._RegisterWidget('_ContactFormView', new _WidgetInfo('ContactForm200', 'AddOns', document.getElementById('ContactForm200'), {'contactFormMessageSendingMsg': 'Sending...', 'contactFormMessageSentMsg': 'Your message has been sent.', 'contactFormMessageNotSentMsg': 'Message could not be sent. Please try again later.', 'contactFormInvalidEmailMsg': 'A valid email address is required.', 'contactFormEmptyMessageMsg': 'Message field cannot be empty.', 'title': 'Contact Form', 'blogId': '1959473607919597673', 'contactFormNameMsg': 'Name', 'contactFormEmailMsg': 'Email', 'contactFormMessageMsg': 'Message', 'contactFormSendMsg': 'Send', 'contactFormToken': 'AOuZoY4i8akbtolzN4cJ4PnCc3pBhrA7Ng:1757104462743', 'submitUrl': 'https://www.blogger.com/contact-form.do'}, 'displayModeFull'));