[{"data":1,"prerenderedAt":1552},["ShallowReactive",2],{"guide-pdf-encryption":3,"related-pdf-encryption":562},{"id":4,"title":5,"body":6,"category":540,"description":541,"extension":542,"keywords":543,"meta":549,"navigation":550,"path":551,"readingTime":552,"relatedTools":553,"seo":557,"stem":558,"type":559,"updatedAt":560,"__hash__":561},"guides\u002Fhelp\u002Fguides\u002Fpdf-encryption.md","PDF加密与解密使用指南：保护您的文档安全",{"type":7,"value":8,"toc":505},"minimark",[9,13,17,22,26,32,45,50,61,65,69,78,82,90,94,100,115,119,122,126,129,133,136,147,150,160,166,172,178,184,187,190,195,206,211,225,230,244,247,252,263,268,279,282,286,291,302,306,311,322,327,338,342,346,357,361,365,376,379,382,387,404,409,424,427,441,444,471,474,477,502],[10,11,5],"h1",{"id":12},"pdf加密与解密使用指南保护您的文档安全",[14,15,16],"p",{},"PDF加密是保护敏感文档的重要手段。通过设置密码，您可以控制谁能够查看、编辑或打印您的PDF文件。本指南将介绍如何使用91AI工具为PDF添加和解除密码保护。",[18,19,21],"h2",{"id":20},"pdf加密的类型","PDF加密的类型",[23,24,25],"h3",{"id":25},"两种密码保护方式",[14,27,28],{},[29,30,31],"strong",{},"1. 打开密码（用户密码）",[33,34,35,39,42],"ul",{},[36,37,38],"li",{},"必须输入密码才能查看文档",[36,40,41],{},"最高级别的保护",[36,43,44],{},"适合机密文件",[14,46,47],{},[29,48,49],{},"2. 权限密码（所有者密码）",[33,51,52,55,58],{},[36,53,54],{},"可以查看但限制操作",[36,56,57],{},"可禁止打印、编辑、复制",[36,59,60],{},"适合分发但需控制的文件",[18,62,64],{"id":63},"为pdf添加密码保护","为PDF添加密码保护",[23,66,68],{"id":67},"第一步访问工具","第一步：访问工具",[14,70,71,72,77],{},"打开 ",[73,74,76],"a",{"href":75},"\u002Ftools\u002Fpdf-lock","91AI PDF加密工具","。",[23,79,81],{"id":80},"第二步上传pdf","第二步：上传PDF",[33,83,84,87],{},[36,85,86],{},"支持最大50MB的文件",[36,88,89],{},"确保您有权限加密该文件",[23,91,93],{"id":92},"第三步设置密码","第三步：设置密码",[14,95,96,99],{},[29,97,98],{},"设置打开密码","：",[101,102,103,106,109,112],"ol",{},[36,104,105],{},"在密码框中输入密码",[36,107,108],{},"建议密码长度8位以上",[36,110,111],{},"包含字母、数字、符号组合",[36,113,114],{},"避免使用简单密码（如123456）",[23,116,118],{"id":117},"第四步执行加密","第四步：执行加密",[14,120,121],{},"点击\"开始加密\"按钮，等待处理完成。",[23,123,125],{"id":124},"第五步下载文件","第五步：下载文件",[14,127,128],{},"下载已加密的PDF文件，务必牢记密码。",[18,130,132],{"id":131},"解除pdf密码","解除PDF密码",[23,134,135],{"id":135},"适用场景",[33,137,138,141,144],{},[36,139,140],{},"忘记了之前设置的密码",[36,142,143],{},"收到带密码的PDF需要去除保护",[36,145,146],{},"需要编辑受限制的PDF",[23,148,149],{"id":149},"操作步骤",[14,151,152,155,156,77],{},[29,153,154],{},"第一步","：打开 ",[73,157,159],{"href":158},"\u002Ftools\u002Fpdf-unlock","91AI PDF解密工具",[14,161,162,165],{},[29,163,164],{},"第二步","：上传带密码的PDF文件。",[14,167,168,171],{},[29,169,170],{},"第三步","：输入正确的原始密码。",[14,173,174,177],{},[29,175,176],{},"第四步","：点击\"开始解密\"。",[14,179,180,183],{},[29,181,182],{},"第五步","：下载解密后的文件。",[18,185,186],{"id":186},"密码安全建议",[23,188,189],{"id":189},"设置强密码",[14,191,192,99],{},[29,193,194],{},"密码长度",[33,196,197,200,203],{},[36,198,199],{},"至少8位字符",[36,201,202],{},"建议12位以上",[36,204,205],{},"越长越安全",[14,207,208,99],{},[29,209,210],{},"密码复杂度",[33,212,213,216,219,222],{},[36,214,215],{},"包含大写字母（A-Z）",[36,217,218],{},"包含小写字母（a-z）",[36,220,221],{},"包含数字（0-9）",[36,223,224],{},"包含特殊符号（!@#$%）",[14,226,227,99],{},[29,228,229],{},"避免使用",[33,231,232,235,238,241],{},[36,233,234],{},"生日、电话号码",[36,236,237],{},"连续数字（123456）",[36,239,240],{},"简单单词（password）",[36,242,243],{},"重复字符（aaaaaa）",[23,245,246],{"id":246},"密码管理",[14,248,249,99],{},[29,250,251],{},"安全保存",[33,253,254,257,260],{},[36,255,256],{},"使用密码管理器",[36,258,259],{},"记录在安全的地方",[36,261,262],{},"不要贴在电脑上",[14,264,265,99],{},[29,266,267],{},"分享注意",[33,269,270,273,276],{},[36,271,272],{},"单独发送密码",[36,274,275],{},"不要和密码一起发送",[36,277,278],{},"考虑使用临时密码",[18,280,281],{"id":281},"常见问题",[23,283,285],{"id":284},"q1-忘记密码怎么办","Q1: 忘记密码怎么办？",[14,287,288,99],{},[29,289,290],{},"回答",[33,292,293,296,299],{},[36,294,295],{},"91AI无法破解未知密码",[36,297,298],{},"如果忘记密码，文件无法恢复",[36,300,301],{},"建议做好密码备份",[23,303,305],{"id":304},"q2-加密后文件打不开","Q2: 加密后文件打不开？",[14,307,308,99],{},[29,309,310],{},"可能原因",[33,312,313,316,319],{},[36,314,315],{},"密码输入错误",[36,317,318],{},"文件损坏",[36,320,321],{},"浏览器问题",[14,323,324,99],{},[29,325,326],{},"解决",[33,328,329,332,335],{},[36,330,331],{},"仔细核对密码大小写",[36,333,334],{},"重新下载加密文件",[36,336,337],{},"尝试不同的PDF阅读器",[23,339,341],{"id":340},"q3-可以批量加密吗","Q3: 可以批量加密吗？",[14,343,344,99],{},[29,345,290],{},[33,347,348,351,354],{},[36,349,350],{},"目前需要逐个处理",[36,352,353],{},"每个文件使用相同或不同密码",[36,355,356],{},"批量处理建议保持一致密码",[23,358,360],{"id":359},"q4-加密会影响文件质量吗","Q4: 加密会影响文件质量吗？",[14,362,363,99],{},[29,364,290],{},[33,366,367,370,373],{},[36,368,369],{},"不影响PDF内容和质量",[36,371,372],{},"仅添加密码保护",[36,374,375],{},"文件大小略有增加",[18,377,378],{"id":378},"安全使用建议",[23,380,381],{"id":381},"保护敏感文件",[14,383,384,99],{},[29,385,386],{},"适用加密的文件类型",[33,388,389,392,395,398,401],{},[36,390,391],{},"合同和协议",[36,393,394],{},"财务报表",[36,396,397],{},"个人身份证件",[36,399,400],{},"机密文档",[36,402,403],{},"商业计划书",[14,405,406,99],{},[29,407,408],{},"结合其他保护措施",[33,410,411,418,421],{},[36,412,413,414],{},"添加",[73,415,417],{"href":416},"\u002Ftools\u002Fpdf-watermark","PDF水印",[36,419,420],{},"限制打印权限",[36,422,423],{},"控制文件分发范围",[23,425,426],{"id":426},"合法使用提醒",[33,428,429,432,435,438],{},[36,430,431],{},"只加密您拥有权限的文件",[36,433,434],{},"不要破解他人的加密文件",[36,436,437],{},"尊重文档的知识产权",[36,439,440],{},"遵守相关法规",[18,442,443],{"id":443},"相关工具",[33,445,446,454,462],{},[36,447,448,453],{},[29,449,450],{},[73,451,452],{"href":416},"PDF加水印"," - 添加可见水印标识",[36,455,456,461],{},[29,457,458],{},[73,459,460],{"href":75},"PDF权限设置"," - 限制打印、编辑等操作",[36,463,464,470],{},[29,465,466],{},[73,467,469],{"href":468},"\u002Fhelp\u002Fsecurity-privacy","PDF安全中心"," - 了解更多安全知识",[18,472,473],{"id":473},"总结",[14,475,476],{},"PDF加密是保护文档安全的有效手段：",[101,478,479,485,490,496],{},[36,480,481,484],{},[29,482,483],{},"选择加密类型","：打开密码或权限密码",[36,486,487,489],{},[29,488,189],{},"：长度+复杂度=安全性",[36,491,492,495],{},[29,493,494],{},"妥善管理密码","：安全保存，防止丢失",[36,497,498,501],{},[29,499,500],{},"合法合规使用","：尊重他人文件版权",[14,503,504],{},"合理使用加密功能，让您的PDF文档更加安全可靠。",{"title":506,"searchDepth":507,"depth":507,"links":508},"",2,[509,513,520,524,528,534,538,539],{"id":20,"depth":507,"text":21,"children":510},[511],{"id":25,"depth":512,"text":25},3,{"id":63,"depth":507,"text":64,"children":514},[515,516,517,518,519],{"id":67,"depth":512,"text":68},{"id":80,"depth":512,"text":81},{"id":92,"depth":512,"text":93},{"id":117,"depth":512,"text":118},{"id":124,"depth":512,"text":125},{"id":131,"depth":507,"text":132,"children":521},[522,523],{"id":135,"depth":512,"text":135},{"id":149,"depth":512,"text":149},{"id":186,"depth":507,"text":186,"children":525},[526,527],{"id":189,"depth":512,"text":189},{"id":246,"depth":512,"text":246},{"id":281,"depth":507,"text":281,"children":529},[530,531,532,533],{"id":284,"depth":512,"text":285},{"id":304,"depth":512,"text":305},{"id":340,"depth":512,"text":341},{"id":359,"depth":512,"text":360},{"id":378,"depth":507,"text":378,"children":535},[536,537],{"id":381,"depth":512,"text":381},{"id":426,"depth":512,"text":426},{"id":443,"depth":507,"text":443},{"id":473,"depth":507,"text":473},"pdf-security","学习如何为PDF文件设置密码保护，以及如何解除PDF密码，确保文档安全和便捷访问。","md",[544,545,546,547,548],"PDF加密","PDF解密","PDF密码","文档保护","PDF安全",{},true,"\u002Fhelp\u002Fguides\u002Fpdf-encryption",5,[554,555,556],"pdf-lock","pdf-unlock","pdf-watermark",{"title":5,"description":541},"help\u002Fguides\u002Fpdf-encryption","guide","2026-05-03","i8G0XoUjtovfqUxKGsDfQ1VUzSfS-GX0CzcJLrTIimQ",[563,942],{"id":4,"title":5,"body":564,"category":540,"description":541,"extension":542,"keywords":938,"meta":939,"navigation":550,"path":551,"readingTime":552,"relatedTools":940,"seo":941,"stem":558,"type":559,"updatedAt":560,"__hash__":561},{"type":7,"value":565,"toc":906},[566,568,570,572,574,578,586,590,598,600,602,606,608,614,616,620,630,632,634,636,638,640,642,650,652,658,662,666,670,674,676,678,682,690,694,704,708,718,720,724,732,736,744,746,748,752,760,762,766,774,778,786,788,792,800,802,806,814,816,818,822,834,838,848,850,860,862,882,884,886,904],[10,567,5],{"id":12},[14,569,16],{},[18,571,21],{"id":20},[23,573,25],{"id":25},[14,575,576],{},[29,577,31],{},[33,579,580,582,584],{},[36,581,38],{},[36,583,41],{},[36,585,44],{},[14,587,588],{},[29,589,49],{},[33,591,592,594,596],{},[36,593,54],{},[36,595,57],{},[36,597,60],{},[18,599,64],{"id":63},[23,601,68],{"id":67},[14,603,71,604,77],{},[73,605,76],{"href":75},[23,607,81],{"id":80},[33,609,610,612],{},[36,611,86],{},[36,613,89],{},[23,615,93],{"id":92},[14,617,618,99],{},[29,619,98],{},[101,621,622,624,626,628],{},[36,623,105],{},[36,625,108],{},[36,627,111],{},[36,629,114],{},[23,631,118],{"id":117},[14,633,121],{},[23,635,125],{"id":124},[14,637,128],{},[18,639,132],{"id":131},[23,641,135],{"id":135},[33,643,644,646,648],{},[36,645,140],{},[36,647,143],{},[36,649,146],{},[23,651,149],{"id":149},[14,653,654,155,656,77],{},[29,655,154],{},[73,657,159],{"href":158},[14,659,660,165],{},[29,661,164],{},[14,663,664,171],{},[29,665,170],{},[14,667,668,177],{},[29,669,176],{},[14,671,672,183],{},[29,673,182],{},[18,675,186],{"id":186},[23,677,189],{"id":189},[14,679,680,99],{},[29,681,194],{},[33,683,684,686,688],{},[36,685,199],{},[36,687,202],{},[36,689,205],{},[14,691,692,99],{},[29,693,210],{},[33,695,696,698,700,702],{},[36,697,215],{},[36,699,218],{},[36,701,221],{},[36,703,224],{},[14,705,706,99],{},[29,707,229],{},[33,709,710,712,714,716],{},[36,711,234],{},[36,713,237],{},[36,715,240],{},[36,717,243],{},[23,719,246],{"id":246},[14,721,722,99],{},[29,723,251],{},[33,725,726,728,730],{},[36,727,256],{},[36,729,259],{},[36,731,262],{},[14,733,734,99],{},[29,735,267],{},[33,737,738,740,742],{},[36,739,272],{},[36,741,275],{},[36,743,278],{},[18,745,281],{"id":281},[23,747,285],{"id":284},[14,749,750,99],{},[29,751,290],{},[33,753,754,756,758],{},[36,755,295],{},[36,757,298],{},[36,759,301],{},[23,761,305],{"id":304},[14,763,764,99],{},[29,765,310],{},[33,767,768,770,772],{},[36,769,315],{},[36,771,318],{},[36,773,321],{},[14,775,776,99],{},[29,777,326],{},[33,779,780,782,784],{},[36,781,331],{},[36,783,334],{},[36,785,337],{},[23,787,341],{"id":340},[14,789,790,99],{},[29,791,290],{},[33,793,794,796,798],{},[36,795,350],{},[36,797,353],{},[36,799,356],{},[23,801,360],{"id":359},[14,803,804,99],{},[29,805,290],{},[33,807,808,810,812],{},[36,809,369],{},[36,811,372],{},[36,813,375],{},[18,815,378],{"id":378},[23,817,381],{"id":381},[14,819,820,99],{},[29,821,386],{},[33,823,824,826,828,830,832],{},[36,825,391],{},[36,827,394],{},[36,829,397],{},[36,831,400],{},[36,833,403],{},[14,835,836,99],{},[29,837,408],{},[33,839,840,844,846],{},[36,841,413,842],{},[73,843,417],{"href":416},[36,845,420],{},[36,847,423],{},[23,849,426],{"id":426},[33,851,852,854,856,858],{},[36,853,431],{},[36,855,434],{},[36,857,437],{},[36,859,440],{},[18,861,443],{"id":443},[33,863,864,870,876],{},[36,865,866,453],{},[29,867,868],{},[73,869,452],{"href":416},[36,871,872,461],{},[29,873,874],{},[73,875,460],{"href":75},[36,877,878,470],{},[29,879,880],{},[73,881,469],{"href":468},[18,883,473],{"id":473},[14,885,476],{},[101,887,888,892,896,900],{},[36,889,890,484],{},[29,891,483],{},[36,893,894,489],{},[29,895,189],{},[36,897,898,495],{},[29,899,494],{},[36,901,902,501],{},[29,903,500],{},[14,905,504],{},{"title":506,"searchDepth":507,"depth":507,"links":907},[908,911,918,922,926,932,936,937],{"id":20,"depth":507,"text":21,"children":909},[910],{"id":25,"depth":512,"text":25},{"id":63,"depth":507,"text":64,"children":912},[913,914,915,916,917],{"id":67,"depth":512,"text":68},{"id":80,"depth":512,"text":81},{"id":92,"depth":512,"text":93},{"id":117,"depth":512,"text":118},{"id":124,"depth":512,"text":125},{"id":131,"depth":507,"text":132,"children":919},[920,921],{"id":135,"depth":512,"text":135},{"id":149,"depth":512,"text":149},{"id":186,"depth":507,"text":186,"children":923},[924,925],{"id":189,"depth":512,"text":189},{"id":246,"depth":512,"text":246},{"id":281,"depth":507,"text":281,"children":927},[928,929,930,931],{"id":284,"depth":512,"text":285},{"id":304,"depth":512,"text":305},{"id":340,"depth":512,"text":341},{"id":359,"depth":512,"text":360},{"id":378,"depth":507,"text":378,"children":933},[934,935],{"id":381,"depth":512,"text":381},{"id":426,"depth":512,"text":426},{"id":443,"depth":507,"text":443},{"id":473,"depth":507,"text":473},[544,545,546,547,548],{},[554,555,556],{"title":5,"description":541},{"id":943,"title":944,"body":945,"category":540,"description":1543,"extension":542,"keywords":1544,"meta":1546,"navigation":550,"path":1547,"readingTime":552,"relatedTools":1548,"seo":1549,"stem":1550,"type":559,"updatedAt":560,"__hash__":1551},"guides\u002Fhelp\u002Fguides\u002Fpdf-watermark.md","PDF加水印使用指南：保护文档版权与机密性",{"type":7,"value":946,"toc":1512},[947,950,953,957,960,1026,1030,1033,1038,1052,1057,1070,1073,1090,1093,1097,1102,1107,1118,1122,1127,1141,1146,1159,1163,1168,1179,1184,1195,1200,1211,1215,1229,1231,1234,1237,1240,1245,1262,1267,1284,1287,1292,1306,1311,1322,1324,1328,1332,1347,1351,1355,1366,1370,1374,1390,1394,1398,1411,1414,1417,1422,1436,1441,1452,1454,1478,1480,1483,1509],[10,948,944],{"id":949},"pdf加水印使用指南保护文档版权与机密性",[14,951,952],{},"为PDF文件添加水印是保护文档版权、标识机密等级的有效方法。无论是公司机密文件、个人原创作品，还是草稿预览，水印都能起到标识和保护作用。本指南将介绍如何使用91AI工具为PDF添加水印。",[18,954,956],{"id":955},"为什么需要pdf水印","为什么需要PDF水印？",[23,958,959],{"id":959},"水印的作用",[101,961,962,978,994,1010],{},[36,963,964,967],{},[29,965,966],{},"版权声明",[33,968,969,972,975],{},[36,970,971],{},"标识文档所有者",[36,973,974],{},"防止未经授权的复制",[36,976,977],{},"宣示知识产权",[36,979,980,983],{},[29,981,982],{},"机密标识",[33,984,985,988,991],{},[36,986,987],{},"标注\"机密\"、\"内部资料\"",[36,989,990],{},"提醒阅读者注意保密",[36,992,993],{},"追踪文档泄露来源",[36,995,996,999],{},[29,997,998],{},"草稿标记",[33,1000,1001,1004,1007],{},[36,1002,1003],{},"标注\"草稿\"、\"预览版\"",[36,1005,1006],{},"防止误用未完成版本",[36,1008,1009],{},"明确文件状态",[36,1011,1012,1015],{},[29,1013,1014],{},"品牌宣传",[33,1016,1017,1020,1023],{},[36,1018,1019],{},"添加公司Logo",[36,1021,1022],{},"统一文档形象",[36,1024,1025],{},"提升专业感",[18,1027,1029],{"id":1028},"_91ai水印功能介绍","91AI水印功能介绍",[23,1031,1032],{"id":1032},"支持的水印类型",[14,1034,1035,99],{},[29,1036,1037],{},"文字水印",[33,1039,1040,1043,1046,1049],{},[36,1041,1042],{},"自定义文字内容",[36,1044,1045],{},"调整字体、大小、颜色",[36,1047,1048],{},"设置透明度",[36,1050,1051],{},"旋转角度",[14,1053,1054,99],{},[29,1055,1056],{},"图片水印",[33,1058,1059,1062,1065,1067],{},[36,1060,1061],{},"支持JPG\u002FPNG格式",[36,1063,1064],{},"可调整大小",[36,1066,1048],{},[36,1068,1069],{},"支持Logo图片",[23,1071,1072],{"id":1072},"水印位置选项",[33,1074,1075,1078,1081,1084,1087],{},[36,1076,1077],{},"居中显示",[36,1079,1080],{},"平铺整个页面",[36,1082,1083],{},"左上角\u002F右上角",[36,1085,1086],{},"左下角\u002F右下角",[36,1088,1089],{},"自定义位置",[18,1091,1092],{"id":1092},"使用步骤详解",[23,1094,1096],{"id":1095},"第一步上传pdf文件","第一步：上传PDF文件",[14,1098,71,1099,77],{},[73,1100,1101],{"href":416},"91AI PDF加水印工具",[14,1103,1104,99],{},[29,1105,1106],{},"文件要求",[33,1108,1109,1112,1115],{},[36,1110,1111],{},"格式：PDF",[36,1113,1114],{},"大小：最大50MB",[36,1116,1117],{},"页数：无限制",[23,1119,1121],{"id":1120},"第二步选择水印类型","第二步：选择水印类型",[14,1123,1124,99],{},[29,1125,1126],{},"添加文字水印",[101,1128,1129,1132,1135,1138],{},[36,1130,1131],{},"选择\"文字水印\"选项",[36,1133,1134],{},"输入水印文字（如\"机密文件\"、\"版权声明\"）",[36,1136,1137],{},"选择字体和大小",[36,1139,1140],{},"设置颜色（推荐灰色，透明度50%）",[14,1142,1143,99],{},[29,1144,1145],{},"添加图片水印",[101,1147,1148,1151,1154,1157],{},[36,1149,1150],{},"选择\"图片水印\"选项",[36,1152,1153],{},"上传水印图片（建议PNG透明背景）",[36,1155,1156],{},"调整图片大小",[36,1158,1048],{},[23,1160,1162],{"id":1161},"第三步设置水印样式","第三步：设置水印样式",[14,1164,1165,99],{},[29,1166,1167],{},"透明度建议",[33,1169,1170,1173,1176],{},[36,1171,1172],{},"文字水印：30-50%",[36,1174,1175],{},"图片水印：20-40%",[36,1177,1178],{},"过低会不明显，过高影响阅读",[14,1180,1181,99],{},[29,1182,1183],{},"位置建议",[33,1185,1186,1189,1192],{},[36,1187,1188],{},"正式文件：平铺或居中",[36,1190,1191],{},"草稿文件：居中大字",[36,1193,1194],{},"版权保护：平铺半透明",[14,1196,1197,99],{},[29,1198,1199],{},"角度建议",[33,1201,1202,1205,1208],{},[36,1203,1204],{},"标准平铺：45度斜角",[36,1206,1207],{},"水平显示：0度",[36,1209,1210],{},"垂直显示：90度",[23,1212,1214],{"id":1213},"第四步应用水印","第四步：应用水印",[101,1216,1217,1220,1223,1226],{},[36,1218,1219],{},"预览水印效果",[36,1221,1222],{},"确认设置无误",[36,1224,1225],{},"点击\"添加水印\"按钮",[36,1227,1228],{},"等待处理完成",[23,1230,125],{"id":124},[14,1232,1233],{},"处理完成后下载带水印的PDF文件。",[18,1235,1236],{"id":1236},"水印设计最佳实践",[23,1238,1239],{"id":1239},"文字水印设计",[14,1241,1242,99],{},[29,1243,1244],{},"版权水印示例",[33,1246,1247,1250,1253,1256,1259],{},[36,1248,1249],{},"文字：\"版权所有 © 公司名称\"",[36,1251,1252],{},"字体：微软雅黑",[36,1254,1255],{},"大小：48-72号",[36,1257,1258],{},"颜色：灰色，透明度40%",[36,1260,1261],{},"位置：平铺",[14,1263,1264,99],{},[29,1265,1266],{},"机密水印示例",[33,1268,1269,1272,1275,1278,1281],{},[36,1270,1271],{},"文字：\"机密文件 - 内部使用\"",[36,1273,1274],{},"字体：黑体",[36,1276,1277],{},"大小：60号",[36,1279,1280],{},"颜色：红色，透明度30%",[36,1282,1283],{},"位置：居中",[23,1285,1286],{"id":1286},"图片水印设计",[14,1288,1289,99],{},[29,1290,1291],{},"公司Logo水印",[101,1293,1294,1297,1300,1303],{},[36,1295,1296],{},"准备透明背景PNG图片",[36,1298,1299],{},"建议尺寸：300-500像素宽",[36,1301,1302],{},"设置透明度为30%",[36,1304,1305],{},"选择平铺或右下角位置",[14,1307,1308,99],{},[29,1309,1310],{},"注意事项",[33,1312,1313,1316,1319],{},[36,1314,1315],{},"确保图片清晰度",[36,1317,1318],{},"透明度不要过高",[36,1320,1321],{},"避免影响正文阅读",[18,1323,281],{"id":281},[23,1325,1327],{"id":1326},"q1-水印可以删除吗","Q1: 水印可以删除吗？",[14,1329,1330,99],{},[29,1331,290],{},[33,1333,1334,1337,1340],{},[36,1335,1336],{},"添加的水印与PDF内容融合",[36,1338,1339],{},"普通方法难以去除",[36,1341,1342,1343,1346],{},"如需去除，可使用",[73,1344,1345],{"href":158},"PDF解密工具","（需有权限）",[23,1348,1350],{"id":1349},"q2-每页可以添加不同水印吗","Q2: 每页可以添加不同水印吗？",[14,1352,1353,99],{},[29,1354,290],{},[33,1356,1357,1360,1363],{},[36,1358,1359],{},"当前版本支持统一水印",[36,1361,1362],{},"如需不同水印，需分多次处理",[36,1364,1365],{},"或使用专业PDF编辑软件",[23,1367,1369],{"id":1368},"q3-水印影响文件大小吗","Q3: 水印影响文件大小吗？",[14,1371,1372,99],{},[29,1373,290],{},[33,1375,1376,1379,1382],{},[36,1377,1378],{},"文字水印：影响很小（增加几KB）",[36,1380,1381],{},"图片水印：会增加图片大小",[36,1383,1384,1385,1389],{},"建议使用",[73,1386,1388],{"href":1387},"\u002Ftools\u002Fpdf-compress","PDF压缩工具","优化",[23,1391,1393],{"id":1392},"q4-加密pdf能添加水印吗","Q4: 加密PDF能添加水印吗？",[14,1395,1396,99],{},[29,1397,290],{},[33,1399,1400,1403,1408],{},[36,1401,1402],{},"加密PDF需先解除密码",[36,1404,1405,1406],{},"使用",[73,1407,1345],{"href":158},[36,1409,1410],{},"添加水印后可重新加密",[18,1412,1413],{"id":1413},"安全建议",[23,1415,1416],{"id":1416},"敏感文件处理",[14,1418,1419,99],{},[29,1420,1421],{},"机密文件",[101,1423,1424,1427,1433],{},[36,1425,1426],{},"添加\"机密\"水印",[36,1428,1429,1430],{},"同时设置",[73,1431,1432],{"href":75},"PDF密码保护",[36,1434,1435],{},"限制打印和复制权限",[14,1437,1438,99],{},[29,1439,1440],{},"版权文件",[101,1442,1443,1446,1449],{},[36,1444,1445],{},"添加版权水印",[36,1447,1448],{},"包含联系信息",[36,1450,1451],{},"设置合适的透明度",[18,1453,443],{"id":443},[33,1455,1456,1463,1470],{},[36,1457,1458,1462],{},[29,1459,1460],{},[73,1461,544],{"href":75}," - 设置密码和权限",[36,1464,1465,1469],{},[29,1466,1467],{},[73,1468,545],{"href":158}," - 解除密码保护",[36,1471,1472,1477],{},[29,1473,1474],{},[73,1475,1476],{"href":1387},"PDF压缩"," - 优化文件大小",[18,1479,473],{"id":473},[14,1481,1482],{},"PDF水印是保护文档的有效方式。通过91AI工具，您可以轻松添加文字或图片水印：",[101,1484,1485,1491,1497,1503],{},[36,1486,1487,1490],{},[29,1488,1489],{},"设计水印","：选择合适的文字\u002F图片，设置透明度",[36,1492,1493,1496],{},[29,1494,1495],{},"选择位置","：根据用途选择平铺、居中或角落位置",[36,1498,1499,1502],{},[29,1500,1501],{},"应用水印","：上传文件，一键添加",[36,1504,1505,1508],{},[29,1506,1507],{},"安全保护","：结合加密功能，全方位保护文档",[14,1510,1511],{},"合理使用水印，让您的PDF文档更加安全可靠。",{"title":506,"searchDepth":507,"depth":507,"links":1513},[1514,1517,1521,1528,1532,1538,1541,1542],{"id":955,"depth":507,"text":956,"children":1515},[1516],{"id":959,"depth":512,"text":959},{"id":1028,"depth":507,"text":1029,"children":1518},[1519,1520],{"id":1032,"depth":512,"text":1032},{"id":1072,"depth":512,"text":1072},{"id":1092,"depth":507,"text":1092,"children":1522},[1523,1524,1525,1526,1527],{"id":1095,"depth":512,"text":1096},{"id":1120,"depth":512,"text":1121},{"id":1161,"depth":512,"text":1162},{"id":1213,"depth":512,"text":1214},{"id":124,"depth":512,"text":125},{"id":1236,"depth":507,"text":1236,"children":1529},[1530,1531],{"id":1239,"depth":512,"text":1239},{"id":1286,"depth":512,"text":1286},{"id":281,"depth":507,"text":281,"children":1533},[1534,1535,1536,1537],{"id":1326,"depth":512,"text":1327},{"id":1349,"depth":512,"text":1350},{"id":1368,"depth":512,"text":1369},{"id":1392,"depth":512,"text":1393},{"id":1413,"depth":507,"text":1413,"children":1539},[1540],{"id":1416,"depth":512,"text":1416},{"id":443,"depth":507,"text":443},{"id":473,"depth":507,"text":473},"学习如何为PDF文件添加文字或图片水印，保护文档版权、标识机密等级、防止未经授权的使用。",[417,1545,547,966,548],"添加水印",{},"\u002Fhelp\u002Fguides\u002Fpdf-watermark",[556,554,555],{"title":944,"description":1543},"help\u002Fguides\u002Fpdf-watermark","SJhblxqpA9EJa8a1SpEp4sEDo5MbyNlxzyobozHQ2zk",1777868330411]