密匣工具OffTools
打开就能用，文件不上传Open it and work — nothing gets uploaded
视频、PDF、图片、GIF、表情包，目前 31 个，还在继续加。全部在浏览器里本地跑完——文件不离开你的设备，没有账号，没有次数限制，断网也能用（视频处理第一次要下载一次引擎，之后缓存在本地）。Video, PDF, images, GIF and memes — 31 tools today, and still growing. Everything runs locally in your browser: files never leave your device, no account, no limits, and it keeps working offline (video tools load their engine once, then it is cached).
手边只有手机？同样的工具也在微信里 ——Only your phone at hand? The same tools live in WeChat —看看小程序see the mini program
视频工具Video tools
4 个4截一段、切成几段、去掉声音、取一帧当封面——画面不重压，处理在你自己的机器上跑。Trim a clip, split it into pieces, strip the audio, or save a frame as a cover — no re-encoding when it is not needed, all on your machine.
视频截取Trim Video
拖两下滑块选好起止点，把中间那段存下来。默认不重压，几十秒就能完成。Mark the clip you want and save it. Stream copy by default, so it finishes fast.
视频等分Split Video
按段数平均切开，每段单独导出，适合发朋友圈、发群、绕过时长限制。Split one video into N segments of equal length, each saved as its own file.
视频取封面Video Cover
把进度条拖到想要的那一秒，截下来存成 PNG，可以直接当封面图用。Scrub to the frame you want and save it as a PNG — a ready-made thumbnail.
视频静音Mute Video
整条音轨丢掉，画面一个像素都不重压，导出的文件通常还更小。Drop the audio track while keeping the picture untouched.
PDF 工具PDF tools
8 个8合并、拆分、旋转重排、图片转 PDF，都在本地完成。Merge, split, rotate & reorder, or turn images into a PDF — all locally.
PDF 合并Merge PDF
把多份 PDF 按你排好的顺序合成一个文件，支持拖拽排序，文件不上传。Merge multiple PDFs in the order you set, with drag-to-reorder. Nothing is uploaded.
PDF 拆分Split PDF
按页码把 PDF 拆成单页或多个区间，要哪几页取哪几页。Split a PDF by page ranges — take just the pages you need.
PDF 旋转 / 重排Rotate & Reorder PDF
把扫歪的页面转正，或拖动调整页面顺序、删掉不要的页。Rotate scanned pages upright, drag to reorder, and drop the pages you don’t want.
图片转 PDFImages to PDF
把多张 JPG / PNG 拼成一份 PDF，可设横竖版与边距。Combine JPG/PNG images into a single PDF, with portrait/landscape and margin options.
PDF 转图片PDF to Images
按 72–300 DPI 渲染每一页，导出 PNG 或 JPG，还能只取指定页码。Render each page to PNG or JPG at the resolution you choose.
PDF 转长图PDF to Long Image
把所有页面竖向接成一张长图，宽度和页间距可调。Stack all pages into a single long image, handy for sharing in chat.
PDF 加水印PDF Watermark
支持中文水印，字号、颜色、透明度、斜角、是否平铺都能调。Tile or centre a watermark across all pages, with size, colour and opacity controls.
PDF 签名Sign PDF
在面板上手写，再选签在第一页、最后一页或每一页，位置和大小可调。Write your signature with a mouse or finger and place it on any page.
图片工具Image tools
15 个15编辑、压缩、改尺寸、换格式，上传即处理，不合云。Edit, compress, resize, convert — processed the moment you drop them in, never in the cloud.
图片编辑Image Editor
一张图从裁切、转正到加字、贴纸、水印、打码，都在同一页完成，改完直接导出 PNG / JPG。One page for everything: crop and rotate, write on it, drop in a sticker, stamp a watermark, or pixelate what must stay private.
图片压缩Compress Image
拖动滑块控制压缩强度，实时看到体积变化，肉眼几乎看不出差别。Drag a slider to control compression and watch the size change in real time, with barely visible quality loss.
图片改尺寸Resize Image
设定目标宽度或缩放比例，保持比例输出，适合适配头像、封面、网页。Set a target width or scale percentage while keeping the aspect ratio — handy for avatars, covers, web.
图片格式转换Convert Image
把图片在 PNG、JPG、WebP 之间互转，透明背景的图转 JPG 会填白底。Convert between PNG, JPG and WebP. Transparent PNGs become white-backed when saved as JPG.
旋转翻转Rotate & Flip
左转右转 90°、水平或垂直翻转，还能把歪掉的几度慢慢摆正。Rotate 90 degrees, flip horizontally or vertically, or nudge the angle a few degrees.
边框圆角Border & Rounded
四周留白、换底色、切圆角，截图立刻显得干净、像正式图。Padding, border colour and rounded corners — the quick way to make a screenshot look tidy.
九宫格切图Grid Crop
按 2×2 / 3×3 / 4×4 切开，可留间距，发出去拼回一张整图。Slice one photo into 2×2, 3×3 or 4×4 tiles for a seamless grid post.
九宫格拼图Grid Collage
选 2–9 张图，自动按格子铺好，间距、每格大小、底色都能调。Combine up to nine photos into one grid with adjustable gaps and background.
长图拼接Long Image
多张图从上到下接起来，统一宽度，可加间距与底色。Join screenshots or photos vertically into a single long image at a common width.
图片调色Adjust Color
亮度、对比度、饱和度、暖色四个滑块，实时看效果。Sliders for brightness, contrast, saturation and warmth, with a live preview.
图片滤镜Photo Filter
黑白、暖阳、冷调、胶片、褪色、浓郁，浓度从 0 到 100 自己拿捏。Black and white, warm, cool, film, fade or vivid — with adjustable strength.
证件照制作ID Photo
本机 AI 把人像抠出来，换成白、蓝、红或灰底，按证件照规范自动排版；照片不上传。Cut the person out with AI that runs in your browser, swap in a white, blue, red or grey background, and frame it to ID-photo proportions. Nothing is uploaded.
拍立得相框Polaroid Frame
把照片装进拍立得白框，下方留一条可以写字的边。White border and a handwritten line underneath, like a real instant photo.
拍立得拼图Polaroid Collage
四张照片做成拍立得，铺在一张彩色卡纸上，带轻微阴影。Four photos framed as polaroids and laid out on a coloured card.
四连拍Photo Strip
三到四张竖着排进白边里，底部还能加一行标题。Three or four photos stacked in a white strip with a title at the bottom.
GIF 工具GIF tools
2 个2多张图片合成动图，或把已有的 GIF 压小、缩放。Combine stills into an animation, or shrink and resize an existing GIF.
表情包工具Meme & sticker tools
2 个2给图片配文字做成表情包，或纯文字生成一张大字报。Caption an image into a meme, or turn a line of text into a shareable poster.