{"id":11400,"date":"2026-01-10T13:40:40","date_gmt":"2026-01-10T05:40:40","guid":{"rendered":"https:\/\/blog.visual-paradigm.com\/vn\/how-to-unlock-a-pdf-file\/"},"modified":"2026-01-10T13:40:40","modified_gmt":"2026-01-10T05:40:40","slug":"how-to-unlock-a-pdf-file","status":"publish","type":"post","link":"https:\/\/blog.visual-paradigm.com\/vn\/how-to-unlock-a-pdf-file\/","title":{"rendered":"L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 m\u1edf kh\u00f3a m\u1ed9t t\u1ec7p PDF?"},"content":{"rendered":"<p>V\u1edbi Visual Paradigm Online, b\u1ea1n gi\u1edd \u0111\u00e2y c\u00f3 th\u1ec3 ch\u1ec9nh s\u1eeda t\u1ec7p PDF tr\u1ef1c tuy\u1ebfn. N\u00f3 r\u1ea5t d\u1ec5 s\u1eed d\u1ee5ng cho c\u00e1 nh\u00e2n v\u00e0 doanh nghi\u1ec7p m\u1ecdi quy m\u00f4. V\u1edbi tr\u00ecnh ch\u1ec9nh s\u1eeda PDF k\u00e9o v\u00e0 th\u1ea3 tr\u1ef1c tuy\u1ebfn mi\u1ec5n ph\u00ed, b\u1ea1n c\u00f3 th\u1ec3 nhanh ch\u00f3ng v\u00e0 d\u1ec5 d\u00e0ng thay \u0111\u1ed5i v\u0103n b\u1ea3n v\u00e0 h\u00ecnh \u1ea3nh trong b\u1ea5t k\u1ef3 t\u1ec7p PDF n\u00e0o. C\u00e1c l\u1ef1a ch\u1ecdn ph\u00f4ng ch\u1eef, c\u0169ng nh\u01b0 n\u1ed9i dung b\u1ed5 sung nh\u01b0 video, h\u00ecnh \u1ea3nh v\u00e0 hi\u1ec7u \u1ee9ng ho\u1ea1t h\u00ecnh, \u0111\u1ec1u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c thay \u0111\u1ed5i trong t\u00e0i li\u1ec7u PDF. H\u01a1n n\u1eefa, n\u1ebfu b\u1ea1n c\u1ea7n b\u1ea3o m\u1eadt cho t\u1ec7p PDF c\u1ee7a m\u00ecnh, b\u1ea1n c\u00f3 th\u1ec3 b\u1ea3o v\u1ec7 t\u1ec7p PDF b\u1eb1ng m\u1eadt kh\u1ea9u v\u00e0 m\u1edf kh\u00f3a n\u00f3 trong VP Online m\u00e0 kh\u00f4ng c\u1ea7n d\u00f9ng tr\u00ecnh ch\u1ec9nh s\u1eeda PDF. \u0110\u00e2y l\u00e0 m\u1ed9t h\u01b0\u1edbng d\u1eabn nhanh gi\u00fap b\u1ea1n h\u1ecdc c\u00e1ch m\u1edf kh\u00f3a m\u1eadt kh\u1ea9u c\u1ee7a t\u1ec7p PDF m\u1ed9t c\u00e1ch d\u1ec5 d\u00e0ng b\u1eb1ng c\u00f4ng c\u1ee5 c\u1ee7a ch\u00fang t\u00f4i. B\u1ea1n c\u00f3 th\u1ec3 xem video \u0111\u00ednh k\u00e8m ho\u1eb7c \u0111\u1ecdc h\u01b0\u1edbng d\u1eabn b\u00ean d\u01b0\u1edbi.<\/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=\"980\" data-skipgform_ajax_framebjll=\"\" height=\"480\" id=\"_ytid_17663\" loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/3Nf_iI7Y4zg?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=\"980\"><\/iframe><\/div>\n<h2>T\u1ec7p PDF \u0111\u00e3 b\u1ecb kh\u00f3a<\/h2>\n<p>\u0110\u00e2y l\u00e0 t\u1ec7p PDF c\u1ee7a ch\u00fang t\u00f4i \u0111\u00e3 b\u1ecb kh\u00f3a b\u1eb1ng m\u1eadt kh\u1ea9u. Sau khi nh\u1ea5p v\u00e0o m\u1edf t\u1ec7p PDF n\u00e0y, ban \u0111\u1ea7u, b\u1ea1n ph\u1ea3i nh\u1eadp m\u1eadt kh\u1ea9u n\u1ebfu mu\u1ed1n \u0111\u1ecdc n\u1ed9i dung c\u1ee7a t\u1ec7p PDF.<\/p>\n<p><img alt=\"\" class=\"alignnone wp-image-16099 size-full\" decoding=\"async\" height=\"523\" loading=\"lazy\" sizes=\"auto, (max-width: 917px) 100vw, 917px\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/1-1.png\" srcset=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/1-1.png 917w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/1-1-300x171.png 300w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/1-1-768x438.png 768w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/1-1-150x86.png 150w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/1-1-400x228.png 400w\" width=\"917\"\/><\/p>\n<h2>Ch\u1ecdn t\u1ec7p PDF<\/h2>\n<p>\u0110\u1ec3 m\u1edf kh\u00f3a m\u1eadt kh\u1ea9u c\u1ee7a t\u1ec7p PDF, tr\u01b0\u1edbc ti\u00ean, sau khi \u0111\u0103ng nh\u1eadp v\u00e0o Visual Paradigm Online, b\u1ea1n s\u1ebd \u0111\u1ebfn kh\u00f4ng gian l\u00e0m vi\u1ec7c c\u1ee7a m\u00ecnh trong VP Online. B\u1ea1n c\u00f3 th\u1ec3 chuy\u1ec3n \u0111\u1ebfn B\u1ea3ng \u0111i\u1ec1u khi\u1ec3n v\u00e0 ch\u1ecdn \u1ee8ng d\u1ee5ng &#8211; PDF. Sau \u0111\u00f3, b\u1ea1n c\u00f3 th\u1ec3 nh\u1ea5p v\u00e0o n\u00fat PDF \u0111\u1ec3 nh\u1eadp t\u1ec7p PDF t\u1eeb thi\u1ebft b\u1ecb c\u1ee7a m\u00ecnh.<\/p>\n<p><img alt=\"\" class=\"alignnone wp-image-16100 size-full\" decoding=\"async\" height=\"379\" loading=\"lazy\" sizes=\"auto, (max-width: 624px) 100vw, 624px\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/2-1.png\" srcset=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/2-1.png 624w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/2-1-300x182.png 300w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/2-1-150x91.png 150w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/2-1-400x243.png 400w\" width=\"624\"\/><\/p>\n<h2>Ch\u1ecdn m\u1edf kh\u00f3a PDF<\/h2>\n<p>Sau \u0111\u00f3, b\u1ea1n c\u00f3 th\u1ec3 nh\u1ea5p v\u00e0o n\u00fat C\u00f4ng c\u1ee5, v\u00e0 m\u1ed9t danh s\u00e1ch c\u00e1c ch\u1ee9c n\u0103ng li\u00ean quan \u0111\u1ebfn PDF s\u1ebd xu\u1ea5t hi\u1ec7n. Sau \u0111\u00f3, b\u1ea1n c\u00f3 th\u1ec3 ch\u1ecdn M\u1edf kh\u00f3a PDF \u0111\u1ec3 x\u00f3a m\u1eadt kh\u1ea9u c\u1ee7a t\u1ec7p PDF trong VP Online.<\/p>\n<p><img alt=\"\" class=\"alignnone wp-image-16101 size-full\" decoding=\"async\" height=\"507\" loading=\"lazy\" sizes=\"auto, (max-width: 707px) 100vw, 707px\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/3-1.png\" srcset=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/3-1.png 707w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/3-1-300x215.png 300w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/3-1-150x108.png 150w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/3-1-400x287.png 400w\" width=\"707\"\/><\/p>\n<p>\u00a0<\/p>\n<h2>Ch\u1ecdn t\u1ec7p PDF c\u1ee7a b\u1ea1n<\/h2>\n<p>Sau \u0111\u00f3, b\u1ea1n c\u00f3 th\u1ec3 nh\u1ea5p v\u00e0o n\u00fat ch\u1ecdn t\u1ec7p \u0111\u1ec3 t\u1ea3i l\u00ean t\u1ec7p PDF c\u1ee7a b\u1ea1n. C\u1eeda s\u1ed5 thi\u1ebft b\u1ecb s\u1ebd t\u1ef1 \u0111\u1ed9ng xu\u1ea5t hi\u1ec7n v\u00e0 b\u1ea1n c\u00f3 th\u1ec3 ch\u1ecdn t\u1ec7p PDF c\u1ee7a m\u00ecnh tr\u00ean thi\u1ebft b\u1ecb. B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 k\u00e9o v\u00e0 th\u1ea3 t\u1ec7p PDF c\u1ee7a m\u00ecnh v\u00e0o khu v\u1ef1c l\u00e0m vi\u1ec7c. Vi\u1ec7c t\u1ea3i l\u00ean t\u1ec7p c\u1ee7a b\u1ea1n r\u1ea5t nhanh v\u00e0 d\u1ec5 d\u00e0ng.<\/p>\n<p><img alt=\"\" class=\"alignnone wp-image-16102 size-full\" decoding=\"async\" height=\"469\" loading=\"lazy\" sizes=\"auto, (max-width: 797px) 100vw, 797px\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/4-1.png\" srcset=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/4-1.png 797w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/4-1-300x177.png 300w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/4-1-768x452.png 768w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/4-1-150x88.png 150w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/4-1-400x235.png 400w\" width=\"797\"\/><\/p>\n<p><img alt=\"\" class=\"alignnone wp-image-16103 size-full\" decoding=\"async\" height=\"516\" loading=\"lazy\" sizes=\"auto, (max-width: 644px) 100vw, 644px\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/5-1.png\" srcset=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/5-1.png 644w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/5-1-300x240.png 300w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/5-1-150x120.png 150w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/5-1-400x320.png 400w\" width=\"644\"\/><\/p>\n<h2>Nh\u1eadp m\u1eadt kh\u1ea9u<\/h2>\n<p>Sau \u0111\u00f3, b\u1ea1n c\u00f3 th\u1ec3 nh\u1eadp m\u1eadt kh\u1ea9u g\u1ed1c v\u00e0o \u00f4 tr\u1ed1ng b\u00ean d\u01b0\u1edbi. Sau \u0111\u00f3, b\u1ea1n c\u00f3 th\u1ec3 nh\u1ea5p v\u00e0o Ti\u1ebfp t\u1ee5c \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c b\u01b0\u1edbc ti\u1ebfp theo trong vi\u1ec7c x\u00f3a m\u1eadt kh\u1ea9u. Sau khi nh\u1eadp \u0111\u00fang m\u1eadt kh\u1ea9u cho t\u1ec7p PDF, t\u1ec7p s\u1ebd \u0111\u01b0\u1ee3c t\u1ea3i v\u00e0o VP Online. V\u00e0 b\u00e2y gi\u1edd, b\u1ea1n c\u00f3 th\u1ec3 nh\u1ea5p v\u00e0o n\u00fat M\u1edf kh\u00f3a b\u00ean d\u01b0\u1edbi.<\/p>\n<p><img alt=\"\" class=\"alignnone wp-image-16105 size-full\" decoding=\"async\" height=\"463\" loading=\"lazy\" sizes=\"auto, (max-width: 766px) 100vw, 766px\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/6.png\" srcset=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/6.png 766w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/6-300x181.png 300w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/6-150x91.png 150w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/6-400x242.png 400w\" width=\"766\"\/><\/p>\n<p><img alt=\"\" class=\"alignnone wp-image-16106 size-full\" decoding=\"async\" height=\"493\" loading=\"lazy\" sizes=\"auto, (max-width: 804px) 100vw, 804px\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/7-1.png\" srcset=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/7-1.png 804w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/7-1-300x184.png 300w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/7-1-768x471.png 768w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/7-1-150x92.png 150w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/7-1-400x245.png 400w\" width=\"804\"\/><\/p>\n<h2>\u0110\u1ed5i t\u00ean t\u1ec7p PDF c\u1ee7a b\u1ea1n<\/h2>\n<p>Sau khi th\u00eam m\u1eadt kh\u1ea9u cho t\u1ec7p PDF \u0111\u00e3 t\u1ea3i l\u00ean, b\u1ea1n \u0111\u01b0\u1ee3c ph\u00e9p thay \u0111\u1ed5i t\u00ean t\u1ec7p PDF \u0111\u00e3 \u0111\u01b0\u1ee3c m\u1edf kh\u00f3a. Cu\u1ed1i c\u00f9ng, b\u1ea1n c\u00f3 th\u1ec3 t\u1ea3i xu\u1ed1ng t\u1ec7p PDF \u0111\u00e3 \u0111\u01b0\u1ee3c m\u1edf kh\u00f3a trong Visual Paradigm Online. V\u00e0 sau khi t\u1ea3i xu\u1ed1ng t\u1ec7p PDF \u0111\u00e3 \u0111\u01b0\u1ee3c m\u1edf kh\u00f3a, b\u1ea1n c\u00f3 th\u1ec3 nh\u1ea5p \u0111\u1ec3 m\u1edf t\u1ec7p PDF. B\u00e2y gi\u1edd, m\u1eadt kh\u1ea9u kh\u00f4ng c\u00f2n c\u1ea7n thi\u1ebft khi b\u1ea1n mu\u1ed1n \u0111\u1ecdc n\u1ed9i dung c\u1ee7a t\u1ec7p PDF.<\/p>\n<p><img alt=\"\" class=\"alignnone wp-image-16107 size-full\" decoding=\"async\" height=\"427\" loading=\"lazy\" sizes=\"auto, (max-width: 770px) 100vw, 770px\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/8-1.png\" srcset=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/8-1.png 770w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/8-1-300x166.png 300w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/8-1-768x426.png 768w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/8-1-150x83.png 150w, https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/8-1-400x222.png 400w\" width=\"770\"\/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>V\u1edbi Visual Paradigm Online, b\u1ea1n gi\u1edd \u0111\u00e2y c\u00f3 th\u1ec3 ch\u1ec9nh s\u1eeda t\u1ec7p PDF tr\u1ef1c tuy\u1ebfn. N\u00f3 r\u1ea5t d\u1ec5 s\u1eed d\u1ee5ng cho c\u00e1 nh\u00e2n v\u00e0 doanh nghi\u1ec7p m\u1ecdi quy m\u00f4. V\u1edbi tr\u00ecnh ch\u1ec9nh s\u1eeda PDF k\u00e9o v\u00e0 th\u1ea3 tr\u1ef1c tuy\u1ebfn mi\u1ec5n ph\u00ed, b\u1ea1n c\u00f3 th\u1ec3 nhanh ch\u00f3ng v\u00e0 d\u1ec5 d\u00e0ng thay \u0111\u1ed5i v\u0103n b\u1ea3n v\u00e0 h\u00ecnh [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":11401,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"no","_lmt_disable":"","footnotes":""},"categories":[],"tags":[],"class_list":["post-11400","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>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 m\u1edf kh\u00f3a m\u1ed9t t\u1ec7p PDF? - Visual Paradigm Blog<\/title>\n<meta name=\"description\" content=\"If you need the privacy of your PDF, you can protect the PDF with a password and unlock it in VP online without using a 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\/how-to-unlock-a-pdf-file\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 m\u1edf kh\u00f3a m\u1ed9t t\u1ec7p PDF? - Visual Paradigm Blog\" \/>\n<meta property=\"og:description\" content=\"If you need the privacy of your PDF, you can protect the PDF with a password and unlock it in VP online without using a PDF editor.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blog.visual-paradigm.com\/vn\/how-to-unlock-a-pdf-file\/\" \/>\n<meta property=\"og:site_name\" content=\"Visual Paradigm Blog\" \/>\n<meta property=\"article:published_time\" content=\"2026-01-10T05:40:40+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/6.png\" \/><meta property=\"og:image\" content=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/6.png\" \/>\n\t<meta property=\"og:image:width\" content=\"766\" \/>\n\t<meta property=\"og:image:height\" content=\"463\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"vpleanda\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:image\" content=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/6.png\" \/>\n<meta name=\"twitter:label1\" content=\"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi\" \/>\n\t<meta name=\"twitter:data1\" content=\"vpleanda\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 ph\u00fat\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/blog.visual-paradigm.com\/vn\/how-to-unlock-a-pdf-file\/\",\"url\":\"https:\/\/blog.visual-paradigm.com\/vn\/how-to-unlock-a-pdf-file\/\",\"name\":\"L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 m\u1edf kh\u00f3a m\u1ed9t t\u1ec7p PDF? - Visual Paradigm Blog\",\"isPartOf\":{\"@id\":\"https:\/\/blog.visual-paradigm.com\/vn\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/blog.visual-paradigm.com\/vn\/how-to-unlock-a-pdf-file\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/blog.visual-paradigm.com\/vn\/how-to-unlock-a-pdf-file\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/blog.visual-paradigm.com\/vn\/wp-content\/uploads\/sites\/13\/2026\/01\/6.png\",\"datePublished\":\"2026-01-10T05:40:40+00:00\",\"dateModified\":\"2026-01-10T05:40:40+00:00\",\"author\":{\"@id\":\"https:\/\/blog.visual-paradigm.com\/vn\/#\/schema\/person\/6acd2305b60fa353e87c4c7d9eba4039\"},\"description\":\"If you need the privacy of your PDF, you can protect the PDF with a password and unlock it in VP online without using a PDF editor.\",\"breadcrumb\":{\"@id\":\"https:\/\/blog.visual-paradigm.com\/vn\/how-to-unlock-a-pdf-file\/#breadcrumb\"},\"inLanguage\":\"vi\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/blog.visual-paradigm.com\/vn\/how-to-unlock-a-pdf-file\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"vi\",\"@id\":\"https:\/\/blog.visual-paradigm.com\/vn\/how-to-unlock-a-pdf-file\/#primaryimage\",\"url\":\"https:\/\/blog.visual-paradigm.com\/vn\/wp-content\/uploads\/sites\/13\/2026\/01\/6.png\",\"contentUrl\":\"https:\/\/blog.visual-paradigm.com\/vn\/wp-content\/uploads\/sites\/13\/2026\/01\/6.png\",\"width\":766,\"height\":463},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/blog.visual-paradigm.com\/vn\/how-to-unlock-a-pdf-file\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/blog.visual-paradigm.com\/vn\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 m\u1edf kh\u00f3a m\u1ed9t t\u1ec7p PDF?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/blog.visual-paradigm.com\/vn\/#website\",\"url\":\"https:\/\/blog.visual-paradigm.com\/vn\/\",\"name\":\"Visual Paradigm Blog\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/blog.visual-paradigm.com\/vn\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"vi\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/blog.visual-paradigm.com\/vn\/#\/schema\/person\/6acd2305b60fa353e87c4c7d9eba4039\",\"name\":\"vpleanda\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"vi\",\"@id\":\"https:\/\/blog.visual-paradigm.com\/vn\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/4413a1c67e930f1a1dc6be9f25558fbf?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/4413a1c67e930f1a1dc6be9f25558fbf?s=96&d=mm&r=g\",\"caption\":\"vpleanda\"},\"url\":\"https:\/\/blog.visual-paradigm.com\/vn\/author\/vpleanda\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 m\u1edf kh\u00f3a m\u1ed9t t\u1ec7p PDF? - Visual Paradigm Blog","description":"If you need the privacy of your PDF, you can protect the PDF with a password and unlock it in VP online without using a PDF editor.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/blog.visual-paradigm.com\/vn\/how-to-unlock-a-pdf-file\/","og_locale":"vi_VN","og_type":"article","og_title":"L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 m\u1edf kh\u00f3a m\u1ed9t t\u1ec7p PDF? - Visual Paradigm Blog","og_description":"If you need the privacy of your PDF, you can protect the PDF with a password and unlock it in VP online without using a PDF editor.","og_url":"https:\/\/blog.visual-paradigm.com\/vn\/how-to-unlock-a-pdf-file\/","og_site_name":"Visual Paradigm Blog","article_published_time":"2026-01-10T05:40:40+00:00","og_image":[{"url":"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/6.png","type":"","width":"","height":""},{"width":766,"height":463,"url":"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/6.png","type":"image\/png"}],"author":"vpleanda","twitter_card":"summary_large_image","twitter_image":"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/11\/6.png","twitter_misc":{"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi":"vpleanda","\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc":"4 ph\u00fat"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/blog.visual-paradigm.com\/vn\/how-to-unlock-a-pdf-file\/","url":"https:\/\/blog.visual-paradigm.com\/vn\/how-to-unlock-a-pdf-file\/","name":"L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 m\u1edf kh\u00f3a m\u1ed9t t\u1ec7p PDF? - Visual Paradigm Blog","isPartOf":{"@id":"https:\/\/blog.visual-paradigm.com\/vn\/#website"},"primaryImageOfPage":{"@id":"https:\/\/blog.visual-paradigm.com\/vn\/how-to-unlock-a-pdf-file\/#primaryimage"},"image":{"@id":"https:\/\/blog.visual-paradigm.com\/vn\/how-to-unlock-a-pdf-file\/#primaryimage"},"thumbnailUrl":"https:\/\/blog.visual-paradigm.com\/vn\/wp-content\/uploads\/sites\/13\/2026\/01\/6.png","datePublished":"2026-01-10T05:40:40+00:00","dateModified":"2026-01-10T05:40:40+00:00","author":{"@id":"https:\/\/blog.visual-paradigm.com\/vn\/#\/schema\/person\/6acd2305b60fa353e87c4c7d9eba4039"},"description":"If you need the privacy of your PDF, you can protect the PDF with a password and unlock it in VP online without using a PDF editor.","breadcrumb":{"@id":"https:\/\/blog.visual-paradigm.com\/vn\/how-to-unlock-a-pdf-file\/#breadcrumb"},"inLanguage":"vi","potentialAction":[{"@type":"ReadAction","target":["https:\/\/blog.visual-paradigm.com\/vn\/how-to-unlock-a-pdf-file\/"]}]},{"@type":"ImageObject","inLanguage":"vi","@id":"https:\/\/blog.visual-paradigm.com\/vn\/how-to-unlock-a-pdf-file\/#primaryimage","url":"https:\/\/blog.visual-paradigm.com\/vn\/wp-content\/uploads\/sites\/13\/2026\/01\/6.png","contentUrl":"https:\/\/blog.visual-paradigm.com\/vn\/wp-content\/uploads\/sites\/13\/2026\/01\/6.png","width":766,"height":463},{"@type":"BreadcrumbList","@id":"https:\/\/blog.visual-paradigm.com\/vn\/how-to-unlock-a-pdf-file\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/blog.visual-paradigm.com\/vn\/"},{"@type":"ListItem","position":2,"name":"L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 m\u1edf kh\u00f3a m\u1ed9t t\u1ec7p PDF?"}]},{"@type":"WebSite","@id":"https:\/\/blog.visual-paradigm.com\/vn\/#website","url":"https:\/\/blog.visual-paradigm.com\/vn\/","name":"Visual Paradigm Blog","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/blog.visual-paradigm.com\/vn\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"vi"},{"@type":"Person","@id":"https:\/\/blog.visual-paradigm.com\/vn\/#\/schema\/person\/6acd2305b60fa353e87c4c7d9eba4039","name":"vpleanda","image":{"@type":"ImageObject","inLanguage":"vi","@id":"https:\/\/blog.visual-paradigm.com\/vn\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/4413a1c67e930f1a1dc6be9f25558fbf?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/4413a1c67e930f1a1dc6be9f25558fbf?s=96&d=mm&r=g","caption":"vpleanda"},"url":"https:\/\/blog.visual-paradigm.com\/vn\/author\/vpleanda\/"}]}},"modified_by":"vpvera","_links":{"self":[{"href":"https:\/\/blog.visual-paradigm.com\/vn\/wp-json\/wp\/v2\/posts\/11400","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.visual-paradigm.com\/vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.visual-paradigm.com\/vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.visual-paradigm.com\/vn\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.visual-paradigm.com\/vn\/wp-json\/wp\/v2\/comments?post=11400"}],"version-history":[{"count":0,"href":"https:\/\/blog.visual-paradigm.com\/vn\/wp-json\/wp\/v2\/posts\/11400\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.visual-paradigm.com\/vn\/wp-json\/wp\/v2\/media\/11401"}],"wp:attachment":[{"href":"https:\/\/blog.visual-paradigm.com\/vn\/wp-json\/wp\/v2\/media?parent=11400"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.visual-paradigm.com\/vn\/wp-json\/wp\/v2\/categories?post=11400"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.visual-paradigm.com\/vn\/wp-json\/wp\/v2\/tags?post=11400"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}