所有在线工具

Generate memes online.

Convert Video changes your videos between popular formats like MP4, MOV, AVI, and MKV so they play on any device or platform. In-browser encoding means your files are never uploaded, giving you fast, private conversion without installing software.

Watermark PDF stamps a custom text watermark across every page of your PDF so you can protect your documents, assert ownership, and clearly mark a file's status. Add words such as CONFIDENTIAL, DRAFT, SAMPLE, or your own brand name, then fine-tune the color, opacity, font size, and position until it looks exactly right. A diagonal, semi-transparent watermark is ideal for contracts, proposals, invoices, design drafts, and any creative work you want to share without losing control of it. The watermark is applied to the entire document in a single click, so you never have to edit pages one by one. Because the whole process runs locally in your browser, your PDF is never uploaded to a server and your data stays private. The tool is free to use, adds no branding of its own, and requires no sign-up.

Caesar Cipher encrypts and decrypts text using the classic shift cipher, where each letter is moved a set number of places in the alphabet. Choose any shift from 1 to 25 to encode secret messages or decode them. It is a fun, educational tool for learning cryptography basics and solving puzzles. Everything runs in your browser, so your messages stay private.

Word to PDF turns your DOC and DOCX files into clean, shareable PDF documents that look the same on any device. PDF is the standard for resumes, invoices, and contracts because the formatting never shifts. Convert quickly in your browser with no software to install.

Grammar Checker scans your writing for grammar mistakes, spelling errors, and punctuation issues, then suggests corrections. Polish essays, emails, and articles so they read clearly and professionally. It works online in your browser with no sign-up required.

Case Converter instantly changes the capitalization of your text to UPPERCASE, lowercase, Title Case, Sentence case, and more. Fix accidental caps lock, format headings, or prepare titles in one click. It works entirely in your browser.

减小视频文件大小。

Convert between JPG, PNG, WEBP.

Background Remover automatically erases the background from photos so you are left with a clean, transparent subject. Perfect for product photos, profile pictures, and design work. Upload an image and get a cutout in seconds, ready to drop onto any new background.

JSON Formatter beautifies messy JSON with proper indentation and validates it so you can spot errors instantly. Paste minified JSON to make it readable, or check that an API response is well-formed. It runs entirely in your browser.

Add Page Numbers inserts clean, automatic page numbering into any PDF so your documents look polished and are easy to reference. Choose where the numbers appear — bottom center, the corners, or the top — and the tool stamps neat, sequential numbers onto every page for you. Proper pagination is essential for reports, ebooks, theses, legal filings, manuals, and manuscripts, where readers and reviewers need to point to a specific page. You no longer have to renumber by hand or reprint a document just to add page numbers. The tool processes your file locally in your browser, so it stays completely private, and the finished PDF downloads instantly. It is free to use, leaves no watermarks, and needs no account.

Reduce PDF file size.

Build a professional resume or CV online in minutes — completely free, no signup required. Fill in your personal information, work experience, education, and skills, then preview and download as a clean PDF.

Reverse text strings.

Remove Extra Spaces cleans up messy text by collapsing multiple spaces into one, trimming spaces from the start and end of each line, and optionally removing blank lines. It is the fastest way to tidy text copied from documents, spreadsheets, and the web before you reuse it. The cleanup runs instantly in your browser, keeping your text private.

URL Encoder converts text into a safe, URL-encoded format and decodes encoded URLs back to readable text. Handle special characters in links, query parameters, and API requests correctly. It runs instantly in your browser.

Translate imperial inches and fractions into precise millimeters.

Convert PDF documents to Word.

Easily calculate Philippine land title measurements.

Generate favicons from images.

Generate bcrypt hashes.

Convert roof area to roofing squares and bundles.

JPG to PDF lets you turn one or many images into a single, professional PDF document in just a few seconds. Upload JPG, PNG, or WEBP photos, arrange them in the exact order you want, and combine them into one neatly organized PDF that is easy to share, print, email, and archive. It is the perfect way to turn scanned pages, receipts, ID photos, notes, or screenshots into one tidy file instead of juggling dozens of separate images. You can choose the page size and orientation so your images always fit beautifully. Best of all, everything runs entirely inside your browser using fast, secure technology, which means your images are never uploaded to any server. The tool is completely free, adds no watermarks, and requires no account or sign-up.