Canvas，不上传。透明度和 EXIF 写在每个页面上。
图片
Canvas，不上传。透明度和 EXIF 写在每个页面上。
What stays local
PNG 转 JPEG 会丢掉透明通道。JPEG 转 PNG 不会找回细节。
Lossy choices
ASCII 画不是 OCR。
Tools in this category
Image Compressor
Shrink a JPG, PNG, or WebP in the browser and compare the new file size before you download.
PNG to JPG Converter
Flatten PNG transparency onto a white JPEG for email, Word, and CMSes that still reject PNG.
JPG to PNG Converter
Wrap a JPEG as PNG without restoring discarded photo detail—use when a printer or editor wants PNG.
JPG to WebP Converter
Re-encode JPEG photos as WebP for smaller hero images on modern sites. Another lossy pass—keep a master file.
PNG to WebP Converter
Keep PNG alpha in a smaller WebP for UI icons and logos. Check edges if the encoder fringes transparency.
WebP to JPG Converter
Export a WebP still as JPEG when a kiosk or older Office build cannot open WebP. Animation and alpha are dropped.
WebP to PNG Converter
Decode a WebP still into PNG for editors that lack WebP, keeping alpha when the source had it.
SVG to PNG Converter
Rasterize SVG with fonts installed on this device. Missing typefaces drop out of the PNG; scripts are not a sanitizer.
PNG to ICO Converter
Pack a square PNG into a multi-size ICO favicon. Hairline logos vanish at 16×16—start from a simple 256px mark.
ASCII Picture Art
Turn a short banner or a photo into ASCII characters. This is a visualization, not OCR—it will not read text in a screenshot.
QR Code Generator
Generate QR codes for URLs, text, and notes.
Barcode Generator
Free online barcode generator: create CODE 128, CODE 39, EAN-13, UPC-A, ITF-14, and QR codes.
Frequently asked questions
Are my images uploaded to a server?
No. Conversion uses the Canvas API in your browser. Closing the tab discards the file.
Will PNG to JPG keep transparency?
JPEG does not support transparency. Transparent areas are typically flattened to a solid background—often white.
Which format should I use for the web?
WebP often gives smaller files with good quality. JPEG remains the safest choice for broad compatibility.
浏览 Case Modify
Case Modify 提供免费的浏览器工具：大小写转换、代码格式化、随机生成器和单位换算。页面加载后，转换在这台设备上完成。
机器可读摘要: llms.txt, llms-full.txt, agents.txt.