Runs on your device中文
LITTLE TOOLS. LESS FRICTION.

A small toolbox. Your files stay with you.

This is an independent collection of image and PDF utilities that process files inside your browser. The aim is practical: help a file meet a size limit, open on another device, or contain only the pages you need.

What you can do here

Compress a JPG, PNG or WebP image to a chosen byte limit; convert one HEIC photo; combine PDF documents in order; extract PDF pages by range or interval; or convert Markdown to a printable PDF or an editable .docx. Tools are free to use, with no account or watermark.

How the tools work

Image compression uses the browser’s image decoder and canvas encoder. HEIC conversion uses the heic2any decoding engine. PDF operations use pdf-lib, and ZIP downloads use client-zip. These engines run on your device; static code downloads are different from file uploads.

What to check before replacing an original

Compression can reduce dimensions and JPEG is lossy. A converted PNG does not restore details already lost in a HEIC original. PDF page copying is not OCR and may not preserve document-level features such as signatures, bookmarks or interactive forms. Keep your source file and inspect the result.

Our privacy approach

There is no file upload endpoint, cloud file storage, or account system. Task events currently stay in browser memory and no external analytics service is connected. Your hosting requests can still reveal normal connection details to the hosting provider; see the privacy page for the full distinction.