WebP conversion wherever you work
The browser converter is one way in. Fast WebP Converter also works inside your AI assistant, your editor and your code, with one account and one monthly allowance. Ask Claude or ChatGPT for WebP in plain words, let a coding agent optimise a repository, or call the API from your backend.
Free account: 50 conversions a month, shared by every integration.Pick where you work
Claude connector
Add it in one click, ask for WebP in the chat, get a card with the download link and the savings.
ChatGPT app
The same tools in ChatGPT: images, batches as one ZIP, page audits, signed in with your account.
Claude Code plugin
Converts the images of your repository, keeps the originals and updates the references with <picture> fallbacks.
Free image audit
Paste a page URL: every image is measured and encoded to WebP to show the real saving. The same audit as the audit_page tool.
MCP server
One remote server for every MCP client: Streamable HTTP, OAuth or API key.
Which one fits
| You want to… | Use |
|---|---|
| Convert a few images while chatting | The Claude connector or the ChatGPT app |
| Convert the images of a repository and update the code | Claude Code with the plugin, or any coding agent with the MCP server |
| Know what a page would save with WebP | audit_page from any assistant, or the free audit on the website |
| Convert on upload in a CMS, a backend or CI | The REST API |
| Automate in Zapier, Make or n8n | The REST API in JSON mode |
| Convert a folder privately, without an account | The browser converter on the home page |
What you can ask
- “Convert https://example.com/images/hero.png to WebP at quality 80, 1600 px wide at most.”
- “Audit https://example.com and tell me how much I would save by serving its images as WebP.”
- “Convert these product photos to WebP and give me one ZIP: (paste the image URLs)”
- “Turn this animated GIF into an animated WebP: https://example.com/demo.gif”
- “Convert our logo to lossless WebP: https://example.com/logo.png”
- “How many WebP conversions do I have left this month?”
Every assistant talks to the same MCP server
Fast WebP Converter works inside Claude, ChatGPT and any MCP client: ask the assistant to convert an image, a batch or the images of a whole web page to WebP, and it calls Fast WebP Converter's server, which encodes them with libwebp and hands back download links with the size before and after.
Streamable HTTP · OAuth 2.1 with dynamic client registration · or an API key as a Bearer token
Claude Code — bash
The tools every integration uses
| Tool | What it does | Effect |
|---|---|---|
| convert_image | Converts one image to WebP, from a public URL or from image data (base64), with quality, maximum width and lossless options. Returns a download link, the original and WebP sizes, the dimensions and the percentage saved. | 1 conversion; stores the WebP behind a download link |
| convert_images | Converts several images in one call (up to 5 on Free, 50 on Pro) and returns one ZIP download link with the sizes of each file. | 1 conversion per image; stores one ZIP |
| audit_page | Reads a public web page, lists its images with their format and weight, and estimates how much converting them to WebP would save. A starting point for a page-speed plan. The same audit is free on the website at https://www.fastwebpconverter.com/audit. | Read-only; uses no conversion |
| get_account | Your plan, the conversions used and left this month and when the allowance resets. | Read-only, free |
| get_pricing | The current plans and prices, so the assistant quotes the real figures instead of guessing. | Read-only, free |
One account, one allowance
A free Fast WebP Converter account is the way to try it: 50 conversions a month on the server, shared by Claude, ChatGPT, every MCP client and the API. Pro is full access, paid monthly, yearly or once for life ($4.99/month, $29/year or $59 once), with 10,000 server conversions a month (fair use). The monthly allowance resets on the 1st (UTC).
What each plan allows on the server
| Plan | Price | Server conversions | Images per batch call | Image by URL up to | API requests a minute | Download links kept |
|---|---|---|---|---|---|---|
| Free | Free | 50 a month | 5 | 10 MB | 10 | 24 hours |
| Pro | $4.99/month, $29/year or $59 once | 10,000 a month | 50 | 25 MB | 120 | 3 days |
Questions
In a chat, the Claude connector or the ChatGPT app. In a codebase, Claude Code with the plugin, or the MCP server in Cursor, VS Code, Windsurf or Codex. In a backend, a CMS hook or an automation, the REST API. They all use the same account.
Yes. Conversions made through Claude, ChatGPT, MCP clients and the API all count against the account's monthly allowance. A free Fast WebP Converter account is the way to try it: 50 conversions a month on the server, shared by Claude, ChatGPT, every MCP client and the API. Pro is full access, paid monthly, yearly or once for life ($4.99/month, $29/year or $59 once), with 10,000 server conversions a month (fair use). The monthly allowance resets on the 1st (UTC).
No. The browser converter encodes on your device and has its own rules (batches a day, downloads per plan). Only server conversions, from the API and the assistants, use the monthly allowance.
No. A free account includes 50 conversions a month to try it. Pro, full access with 10,000 server conversions a month (fair use), is $4.99/month, $29/year or $59 once (from $2.42/month paid yearly).