{"id":11422,"date":"2026-01-10T14:06:36","date_gmt":"2026-01-10T06:06:36","guid":{"rendered":"https:\/\/blog.visual-paradigm.com\/vn\/remove-password-from-a-pdf\/"},"modified":"2026-01-10T14:06:36","modified_gmt":"2026-01-10T06:06:36","slug":"remove-password-from-a-pdf","status":"publish","type":"post","link":"https:\/\/blog.visual-paradigm.com\/vn\/remove-password-from-a-pdf\/","title":{"rendered":"X\u00f3a m\u1eadt kh\u1ea9u kh\u1ecfi t\u00e0i li\u1ec7u PDF"},"content":{"rendered":"<p>B\u1ea1n c\u00f3 th\u1ec3 m\u00e3 h\u00f3a v\u00e0 b\u1ea3o v\u1ec7 t\u00e0i li\u1ec7u PDF b\u1eb1ng m\u1eadt kh\u1ea9u \u0111\u1ec3 b\u1ea3o v\u1ec7 th\u00f4ng tin nh\u1ea1y c\u1ea3m. Trong video n\u00e0y, b\u1ea1n c\u00f3 th\u1ec3 xem c\u00e1ch x\u00f3a m\u1eadt kh\u1ea9u kh\u1ecfi t\u00e0i li\u1ec7u PDF trong c\u00f4ng c\u1ee5 c\u1ee7a ch\u00fang t\u00f4i<a href=\"https:\/\/online.visual-paradigm.com\/online-pdf-editor\/\">tr\u00ecnh ch\u1ec9nh s\u1eeda PDF tr\u1ef1c tuy\u1ebfn mi\u1ec5n ph\u00ed<\/a>.<\/p>\n<div class=\"epyt-video-wrapper\"><iframe allow=\"fullscreen; accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\" class=\"__youtube_prefs__ epyt-is-override no-lazyload\" data-no-lazy=\"1\" data-origheight=\"480\" data-origwidth=\"854\" data-skipgform_ajax_framebjll=\"\" height=\"480\" id=\"_ytid_64660\" loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/l0cOz7wOP8E?enablejsapi=1&amp;autoplay=0&amp;cc_load_policy=0&amp;cc_lang_pref=&amp;iv_load_policy=1&amp;loop=0&amp;modestbranding=0&amp;rel=1&amp;fs=1&amp;playsinline=0&amp;autohide=2&amp;theme=dark&amp;color=red&amp;controls=1&amp;\" title=\"YouTube player\" width=\"854\"><\/iframe><\/div>\n<p>B\u1ea1n c\u00f3 th\u1ec3 gi\u1edbi h\u1ea1n quy\u1ec1n truy c\u1eadp v\u00e0o t\u00e0i li\u1ec7u PDF b\u1eb1ng c\u00e1ch \u0111\u1eb7t m\u1eadt kh\u1ea9u v\u00e0 gi\u1edbi h\u1ea1n m\u1ed9t s\u1ed1 ch\u1ee9c n\u0103ng, ch\u1eb3ng h\u1ea1n nh\u01b0 in \u1ea5n v\u00e0 ch\u1ec9nh s\u1eeda. Tuy nhi\u00ean, b\u1ea1n kh\u00f4ng th\u1ec3 ng\u0103n vi\u1ec7c l\u01b0u b\u1ea3n sao c\u1ee7a t\u00e0i li\u1ec7u PDF. C\u00e1c b\u1ea3n sao s\u1ebd c\u00f3 c\u00f9ng c\u00e1c gi\u1edbi h\u1ea1n nh\u01b0 t\u00e0i li\u1ec7u PDF g\u1ed1c. C\u00f3 hai lo\u1ea1i m\u00e3 h\u00f3a s\u1eb5n c\u00f3:<\/p>\n<ul>\n<li><strong>M\u1eadt kh\u1ea9u m\u1edf t\u1ec7p<\/strong><br \/>\nM\u1eadt kh\u1ea9u m\u1edf t\u00e0i li\u1ec7u y\u00eau c\u1ea7u ng\u01b0\u1eddi d\u00f9ng nh\u1eadp m\u1eadt kh\u1ea9u \u0111\u1ec3 m\u1edf t\u00e0i li\u1ec7u PDF.<\/li>\n<li><strong>M\u1eadt kh\u1ea9u quy\u1ec1n h\u1ea1n<\/strong><br \/>\nM\u1eadt kh\u1ea9u quy\u1ec1n h\u1ea1n: M\u1ed9t m\u1eadt kh\u1ea9u l\u00e0 b\u1eaft bu\u1ed9c \u0111\u1ec3 thay \u0111\u1ed5i c\u00e0i \u0111\u1eb7t quy\u1ec1n h\u1ea1n. V\u1edbi m\u1eadt kh\u1ea9u quy\u1ec1n h\u1ea1n, b\u1ea1n c\u00f3 th\u1ec3 gi\u1edbi h\u1ea1n in \u1ea5n, ch\u1ec9nh s\u1eeda v\u00e0 sao ch\u00e9p n\u1ed9i dung trong t\u00e0i li\u1ec7u PDF. Ng\u01b0\u1eddi nh\u1eadn c\u00f3 th\u1ec3 m\u1edf t\u00e0i li\u1ec7u m\u00e0 kh\u00f4ng c\u1ea7n m\u1eadt kh\u1ea9u.<\/li>\n<\/ul>\n<h2>X\u00f3a m\u1eadt kh\u1ea9u kh\u1ecfi t\u00e0i li\u1ec7u PDF<\/h2>\n<p>B\u1ea1n c\u00f3 th\u1ec3 x\u00f3a m\u1eadt kh\u1ea9u c\u1ee7a t\u1ec7p PDF b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng tr\u00ecnh ch\u1ec9nh s\u1eeda PDF mi\u1ec5n ph\u00ed tr\u1ef1c tuy\u1ebfn c\u1ee7a Visual Paradigm<a href=\"https:\/\/online.visual-paradigm.com\/online-pdf-editor\/\">tr\u00ecnh ch\u1ec9nh s\u1eeda PDF<\/a>.<\/p>\n<ol>\n<li>Sau khi \u0111\u0103ng nh\u1eadp v\u00e0o kh\u00f4ng gian l\u00e0m vi\u1ec7c Visual Paradigm Online c\u1ee7a b\u1ea1n, h\u00e3y truy c\u1eadp B\u1ea3ng \u0111i\u1ec1u khi\u1ec3n v\u00e0 ch\u1ecdn \u1ee8ng d\u1ee5ng, PDF, r\u1ed3i nh\u1ea5n n\u00fat Nh\u1eadp \u0111\u1ec3 nh\u1eadp t\u1ec7p PDF c\u1ee7a b\u1ea1n.<br \/>\n<img alt=\"\" class=\"alignnone size-full wp-image-10818\" decoding=\"async\" height=\"229\" loading=\"lazy\" sizes=\"auto, (max-width: 178px) 100vw, 178px\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/09\/Screenshot-2022-10-18-103900.png\" srcset=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/09\/Screenshot-2022-10-18-103900.png 178w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/09\/Screenshot-2022-10-18-103900-117x150.png 117w\" width=\"178\"\/><br \/>\n<img alt=\"\" class=\"alignnone size-medium wp-image-10820\" decoding=\"async\" height=\"51\" loading=\"lazy\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/09\/Screenshot-2022-10-18-104752-300x51.png\" srcset=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/09\/Screenshot-2022-10-18-104752-300x51.png 300w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/09\/Screenshot-2022-10-18-104752-150x26.png 150w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/09\/Screenshot-2022-10-18-104752.png 327w\" width=\"300\"\/><\/li>\n<li>\u0110\u00e2y l\u00e0 m\u1ed9t t\u1ec7p PDF \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 b\u1eb1ng m\u1eadt kh\u1ea9u, b\u1ea1n s\u1ebd c\u1ea7n nh\u1eadp m\u1eadt kh\u1ea9u c\u1ee7a t\u1ec7p PDF khi \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u.<br \/>\n<img class=\"alignnone wp-image-13364 size-full\" decoding=\"async\" height=\"323\" loading=\"lazy\" sizes=\"auto, (max-width: 737px) 100vw, 737px\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/09\/Pasted-6.png\" srcset=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/09\/Pasted-6.png 737w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/09\/Pasted-6-300x131.png 300w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/09\/Pasted-6-150x66.png 150w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/09\/Pasted-6-400x175.png 400w\" width=\"737\"\/><\/li>\n<li>Sau \u0111\u00f3, t\u1ec7p PDF s\u1ebd \u0111\u01b0\u1ee3c m\u1edf trong VP Online. B\u1ea1n c\u00f3 th\u1ec3 l\u01b0u n\u00f3 v\u00e0o VP Online, sau \u0111\u00f3 xu\u1ea5t ra d\u01b0\u1edbi d\u1ea1ng t\u1ec7p PDF m\u1edbi.<br \/>\n<img class=\"alignnone wp-image-13363 size-full\" decoding=\"async\" height=\"629\" loading=\"lazy\" sizes=\"auto, (max-width: 1201px) 100vw, 1201px\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/09\/Pasted-5.png\" srcset=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/09\/Pasted-5.png 1201w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/09\/Pasted-5-300x157.png 300w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/09\/Pasted-5-1030x539.png 1030w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/09\/Pasted-5-768x402.png 768w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/09\/Pasted-5-150x79.png 150w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/09\/Pasted-5-400x209.png 400w\" width=\"1201\"\/><\/li>\n<li>B\u00e2y gi\u1edd m\u1eadt kh\u1ea9u c\u1ee7a t\u1ec7p PDF \u0111ang \u0111\u01b0\u1ee3c x\u00f3a.\n<p id=\"TYJLwcL\"><img class=\"alignnone wp-image-13361 size-full\" decoding=\"async\" height=\"687\" loading=\"lazy\" sizes=\"auto, (max-width: 1206px) 100vw, 1206px\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/09\/Pasted-4.png\" srcset=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/09\/Pasted-4.png 1206w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/09\/Pasted-4-300x171.png 300w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/09\/Pasted-4-1030x587.png 1030w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/09\/Pasted-4-768x437.png 768w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/09\/Pasted-4-150x85.png 150w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/09\/Pasted-4-400x228.png 400w\" width=\"1206\"\/><\/p>\n<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>B\u1ea1n c\u00f3 th\u1ec3 m\u00e3 h\u00f3a v\u00e0 b\u1ea3o v\u1ec7 t\u00e0i li\u1ec7u PDF b\u1eb1ng m\u1eadt kh\u1ea9u \u0111\u1ec3 b\u1ea3o v\u1ec7 th\u00f4ng tin nh\u1ea1y c\u1ea3m. Trong video n\u00e0y, b\u1ea1n c\u00f3 th\u1ec3 xem c\u00e1ch x\u00f3a m\u1eadt kh\u1ea9u kh\u1ecfi t\u00e0i li\u1ec7u PDF trong c\u00f4ng c\u1ee5 c\u1ee7a ch\u00fang t\u00f4itr\u00ecnh ch\u1ec9nh s\u1eeda PDF tr\u1ef1c tuy\u1ebfn mi\u1ec5n ph\u00ed. B\u1ea1n c\u00f3 th\u1ec3 gi\u1edbi h\u1ea1n quy\u1ec1n [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":11423,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"no","_lmt_disable":"","footnotes":""},"categories":[],"tags":[],"class_list":["post-11422","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","loop-entry","clr"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>X\u00f3a m\u1eadt kh\u1ea9u kh\u1ecfi t\u00e0i li\u1ec7u PDF - Visual Paradigm Blog<\/title>\n<meta name=\"description\" content=\"You can encrypt and protect PDFs with a password. In this video, you can see how to remove passwords from a PDF in our\u00a0online PDF editor.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.visual-paradigm.com\/vn\/remove-password-from-a-pdf\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"X\u00f3a m\u1eadt kh\u1ea9u kh\u1ecfi t\u00e0i li\u1ec7u PDF - Visual Paradigm Blog\" \/>\n<meta property=\"og:description\" content=\"You can encrypt and protect PDFs with a password. 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