🐷Piglet
中文Workspace

Free online tools

Small, focused utilities for slides, writing and data. Every one of them runs entirely in your browser — nothing is uploaded, and there is no account to create.

Runs on your device
Files are parsed and rendered in the browser. Nothing is uploaded, so you can use these on unpublished work and confidential documents.
Open and go
No sign-up, no install, no extension. Every tool is a single page that works the moment it loads.
Free, with no usage cap
Because the work happens on your machine, there is nothing for us to meter. Use them as often as you like, including commercially.

Slides

📐
Slide Size Converter
Convert slide dimensions between cm, inches, pixels and EMU.

Writing

📄APP
Online LaTeX Editor
Import an Overleaf .zip or start fresh — syntax highlighting, and a PDF that rebuilds while you type.
📑
Word Document Compare
Upload two DOCX files and see every insertion and deletion highlighted.

Data

📊APP
Chart Maker
Drop in a CSV, drag fields onto shelves, export a publication-ready figure.
🧭APP
Diagram Maker
Describe a flowchart or architecture diagram, get clean editable draw.io XML.

Text

📚
Vocabulary Trainer
Drill word lists with learn, dictation and fill-in-the-blank modes.

About these tools

Each tool here does one job and does it without a round trip to a server. That is a deliberate constraint: a converter that runs locally has no queue, no file-size limit imposed by an upload endpoint, and no copy of your document sitting in someone else's storage.

They are built and maintained alongside Pigletgo, an AI tool that turns documents into editable presentations. The tools are free and stand on their own — you never need an account to use one.

Frequently asked questions

Are these tools really free?

Yes. All of them run in your browser, so they cost us nothing per use. There is no paid tier, no watermark and no daily limit.

Do I need to create an account?

No. Nothing on this page asks you to sign in, and none of the tools store data on our servers.

Are my files uploaded?

No. Files are read and processed locally by JavaScript in your browser. You can verify this by opening the network tab — no request carries your file.

Can I use them for work or commercially?

Yes, with no attribution required.

Do they work on a phone?

Most do. The ones built around drag-and-drop — the chart maker in particular — are much easier on a laptop.

Where is my data stored?

In your browser, when a tool needs to remember something between visits. Clearing site data removes it, and nothing syncs to another device.