{"id":829,"date":"2023-01-13T11:03:01","date_gmt":"2023-01-13T11:03:01","guid":{"rendered":"https:\/\/www.pcinfotools.com\/blog\/?p=829"},"modified":"2023-01-13T11:11:29","modified_gmt":"2023-01-13T11:11:29","slug":"free-ost-viewer-to-open-and-read-ost-files-without-outlook","status":"publish","type":"post","link":"https:\/\/www.pcinfotools.com\/blog\/free-ost-viewer-to-open-and-read-ost-files-without-outlook\/","title":{"rendered":"Free OST Viewer to open and read OST files without Outlook"},"content":{"rendered":"<p>Do you know if you have an orphaned OST file, you cannot open them directly? There is no direct method that gives access to OST files. The article draws your attention to how to view OST files without downloading MS Outlook.<\/p>\n<p style=\"text-align: center;\"><a class=\"maxbutton-1 maxbutton maxbutton-download-now\" target=\"_blank\" rel=\"nofollow noopener\" href=\"https:\/\/www.pcinfotools.com\/dl\/freeostfileexporter.exe\"><span class='mb-text'>Download Now<\/span><\/a><\/p>\n<p><strong>What is an OST file?<\/strong><\/p>\n<p>OST is a file format of MS Outlook for Windows. OST stands for Offline Storage Table which can store emails, contacts, notes, journals, messages, events, calendars, and various other folders. Outlook automatically saves its data in OST when it connects with an Exchange account.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_68 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.pcinfotools.com\/blog\/free-ost-viewer-to-open-and-read-ost-files-without-outlook\/#What_is_the_difference_between_an_OST_and_PST_file\" title=\"What is the difference between an OST and PST file?\">What is the difference between an OST and PST file?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.pcinfotools.com\/blog\/free-ost-viewer-to-open-and-read-ost-files-without-outlook\/#What_is_the_email_protocol_used_by_OST\" title=\"What is the email protocol used by OST?\">What is the email protocol used by OST?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.pcinfotools.com\/blog\/free-ost-viewer-to-open-and-read-ost-files-without-outlook\/#What_is_an_OST_file_size\" title=\"What is an OST file size?\">What is an OST file size?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.pcinfotools.com\/blog\/free-ost-viewer-to-open-and-read-ost-files-without-outlook\/#What_is_the_biggest_benefit_of_an_OST_file\" title=\"What is the biggest benefit of an OST file?\">What is the biggest benefit of an OST file?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.pcinfotools.com\/blog\/free-ost-viewer-to-open-and-read-ost-files-without-outlook\/#What_are_the_advantages_of_OST_over_PST\" title=\"What are the advantages of OST over PST?\">What are the advantages of OST over PST?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.pcinfotools.com\/blog\/free-ost-viewer-to-open-and-read-ost-files-without-outlook\/#What_are_the_most_probable_reasons_for_orphaned_OST_files\" title=\"What are the most probable reasons for orphaned OST files?\">What are the most probable reasons for orphaned OST files?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.pcinfotools.com\/blog\/free-ost-viewer-to-open-and-read-ost-files-without-outlook\/#Pcinfotools_OST_Viewer\" title=\"Pcinfotools OST Viewer\">Pcinfotools OST Viewer<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.pcinfotools.com\/blog\/free-ost-viewer-to-open-and-read-ost-files-without-outlook\/#Below_are_the_Characteristics_of_the_OST_Viewer\" title=\"Below are the Characteristics of the OST Viewer\">Below are the Characteristics of the OST Viewer<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.pcinfotools.com\/blog\/free-ost-viewer-to-open-and-read-ost-files-without-outlook\/#What_are_the_Steps_to_Open_OST_Files_Using_the_Free_OST_File_Viewer\" title=\"What are the Steps to Open OST Files Using the Free OST File Viewer?\">What are the Steps to Open OST Files Using the Free OST File Viewer?<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.pcinfotools.com\/blog\/free-ost-viewer-to-open-and-read-ost-files-without-outlook\/#Conclusion\" title=\"Conclusion\">Conclusion<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"What_is_the_difference_between_an_OST_and_PST_file\"><\/span>What is the difference between an OST and PST file?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Both file formats support only MS Outlook for Windows. PST saves data to a local folder and is flexible to share databases from one Outlook account to the other and from one system to another.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_is_the_email_protocol_used_by_OST\"><\/span>What is the email protocol used by OST?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>PST uses POP Accounts, while OST uses IMAP Accounts. The IMAP account synchronizes with the server.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_is_an_OST_file_size\"><\/span>What is an OST file size?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>An OST file stores data in ANSI and Unicode format. It means the file can be 1.5GB or up to 50 GB.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_is_the_biggest_benefit_of_an_OST_file\"><\/span>What is the biggest benefit of an OST file?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>An OST file is accessible without the internet or Wi-Fi. You can work offline. When the connection comes back, the modification in an OST file automatically synchronizes with the Exchange Server.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_are_the_advantages_of_OST_over_PST\"><\/span>What are the advantages of OST over PST?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>An OST file synchronizes automatically, while a PST file needs to be downloaded locally. The modification done on an OST file automatically appears on the server, but a PST file becomes a separate entity after it is downloaded. An OST file can open emails on other devices without the need to download them locally, while a PST file needs download locally.<\/p>\n<blockquote>\n<p style=\"text-align: left;\"><em><strong>Note-<\/strong> In any situation your Outlook OST\u00a0 files is not working and need to <a href=\"https:\/\/www.pcinfotools.com\/blog\/freely-switch-from-ost-to-pst\/\">Convert OST files into PST<\/a> then try the Pcinfotools OST to PST Converter, that instant convert bulk ost files into pst without any errors.<\/em><\/p>\n<\/blockquote>\n<h3><span class=\"ez-toc-section\" id=\"What_are_the_most_probable_reasons_for_orphaned_OST_files\"><\/span>What are the most probable reasons for orphaned OST files?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>An OST file is called orphaned when the mailbox on the server becomes inaccessible. There are various reasons for an orphaned OST file. Users categorize orphaned OST file reasons into primary categories \u2013 hardware reasons and software reasons.<\/p>\n<p>Some hardware reasons for orphaned OST files are data storage failure, abnormal shutdown of the server, and controller card malfunction. Some software reasons for orphaned OST files are denying access to the mailbox on Exchange Server, viruses or malicious applications, and human errors.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Pcinfotools_OST_Viewer\"><\/span>Pcinfotools OST Viewer<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>It is freeware to <a href=\"https:\/\/www.pcinfotools.com\/free-ost-viewer\/\">view orphaned OST files with Free Outlook OST Viewer<\/a>. The utility displays all databases, including emails, calendars, contacts, journals, attachments, etc without MS Outlook installation. It provides previews of OST files regardless of their size.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Below_are_the_Characteristics_of_the_OST_Viewer\"><\/span>Below are the Characteristics of the OST Viewer<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>No File Size Limitation-<\/strong> The application provides a preview of an OST file of any size. It supports ANSI and Unicode OST files.<\/p>\n<p><strong>Generate Complete Preview of an OST File \u2013<\/strong> The app displays the whole data of an OST file, including emails, contacts, journals, tasks, messages, etc. It restores all email components to display on its box, including Subject, CC, BCC, To, From, etc.<\/p>\n<p><strong>No Pre-Requisites-<\/strong> It is an independent viewer, and displays all OST file databases on its display box without taking the help of other applications. The independent doesn\u2019t need the installation of MS Outlook to display data.<\/p>\n<p><strong>Great Compatibility \u2013<\/strong> The application is highly compatible. It allows users to view OST files of all Outlook editions, including the oldest 2002, 2003, 2007, 2010, 2013, 2016, 2019, and all the latest versions of Outlook.<\/p>\n<p><strong>Views Each database Separately \u2013<\/strong> The application displays each folder and items of each folder in its display box. Users can view all components, such as CC, BCC, To, From, Subject, Date, and Attachments.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_are_the_Steps_to_Open_OST_Files_Using_the_Free_OST_File_Viewer\"><\/span>What are the Steps to Open OST Files Using the Free OST File Viewer?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>Download the application on your Windows system.<\/li>\n<li>Hit the Browse button and add a local OST file.<\/li>\n<li>Within a few seconds, the tool will display data<\/li>\n<li>Get the preview of the uploaded OST file<\/li>\n<\/ul>\n<h4><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>The tool offers a smooth and error-free view of the required OST file. It displays data on its preview pane. The tool is safe to use and causes no data loss.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Do you know if you have an orphaned OST file, you cannot open them directly? There is no direct method that gives access to OST files. The article draws your attention to how to view OST files without downloading MS Outlook. What is an OST file? OST is a file format of MS Outlook for&#8230;<\/p>\n<p class=\"more-link-wrap\"><a href=\"https:\/\/www.pcinfotools.com\/blog\/free-ost-viewer-to-open-and-read-ost-files-without-outlook\/\" class=\"more-link\">Read More<span class=\"screen-reader-text\"> &ldquo;Free OST Viewer to open and read OST files without Outlook&rdquo;<\/span> &raquo;<\/a><\/p>\n","protected":false},"author":13,"featured_media":833,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[34],"tags":[],"class_list":["post-829","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ost-viewer"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Free OST Viewer to open and read OST files without Outlook and Exchange Server<\/title>\n<meta name=\"description\" content=\"Instant view orphaned Outlook OST files and 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