# PiPic Image Compressor

> PiPic Image Compressor is a free online image compressor for PNG, JPEG, WebP and AVIF, with an agent-ready CLI for scripts, CI and coding agents.

## What is PiPic

PiPic Image Compressor is a free online image compressor for PNG, JPEG, WebP and AVIF, with an agent-ready CLI for scripts, CI and coding agents.

## Core capabilities

- Compressing images on pipic.cc is 100% free and unlimited — no account or sign-up required
- Batch compression — up to 100 images at once, 8 MB per file
- Supports JPG, PNG, WebP and AVIF — same format in, same format out
- Before/after size comparison for every file, with exact savings shown
- Download a single file or the whole batch as one zip
- Images are processed and deleted immediately after compression — never stored long-term
- The PiPic CLI (@pipic/cli on npm, Node 20+) lets AI agents and build scripts compress images from the command line — NDJSON output and stable exit codes for parsing. It runs inside coding agents like Claude Code, Codex, Cursor and Windsurf, and in CI
- A single command — `npx skills add PiPic-cc/pipic-cli -g` — installs a pipic skill into Claude Code, Codex, Cursor and around 70 other coding agents. After that the agent finds and runs pipic on its own from a plain-English request, without being told the tool name or the flags
- CLI and API usage runs on a monthly allowance, separate from the web compressor: Free gives 100 images per month, Pro is $9/month for 5,000. Web compression is never counted against it
- Authentication supports a user-bound OAuth Device Grant for autonomous agents. The user approves only the first time; the agent then rotates refresh tokens without another prompt. There is no anonymous or service-owned token. Existing CLI per-machine login and user-created PIPIC_TOKEN credentials remain supported

## Key pages

- [Home / compressor](https://pipic.cc/): free online image compressor for JPG, PNG, WebP and AVIF
- [About PiPic](https://pipic.cc/about): official identity and the relationship between the browser compressor, PiPic Agent CLI and HTTP API
- [Compress PNG](https://pipic.cc/compress-png): PNG-specific compressor — transparency preserved, typical 60-80% savings
- [Compress JPG](https://pipic.cc/compress-jpg): JPG/JPEG photo compressor — no visible quality loss
- [Compress WebP](https://pipic.cc/compress-webp): re-optimizes already-efficient WebP files for extra savings
- [Compress AVIF](https://pipic.cc/compress-avif): free online AVIF compressor — reduce AVIF file size in batches while keeping the same dimensions and AVIF format
- [CLI](https://pipic.cc/cli): install @pipic/cli to compress images from scripts, CI and AI agents — the one-command skill install for Claude Code, Codex, Cursor and ~70 other agents, plus commands, flags, exit codes, the NDJSON contract, and a copy-paste prompt that asks your agent to set it up for you
- [OpenAPI spec](https://pipic.cc/openapi.json): machine-readable OpenAPI 3.1 description of POST /compress/image — the raw HTTP endpoint behind the CLI, for agents and scripts that can't run Node
- [Agent authentication](https://pipic.cc/auth.md): OAuth Device Grant with PKCE, one-time approval by a signed-in user, silent refresh-token rotation, revocation, and the explicit rule that every credential belongs to that user
- [Pricing](https://pipic.cc/pricing): the plan matrix — web compression is free and unlimited for everyone; only CLI/API usage is metered (Free 100 images a month, Pro $9 for 5,000)
- [Privacy policy](https://pipic.cc/privacy): what data PiPic collects and how uploaded images are handled
- [Terms of service](https://pipic.cc/terms): the terms that govern use of the free service
- [Contact](https://pipic.cc/contact): contact@pipic.cc for general enquiries, privacy@pipic.cc for data requests
- [Reproducible image-compression dataset](https://pipic.cc/benchmarks/2026-q3/): licensed PNG, JPEG, WebP and AVIF inputs, exact PiPic Agent CLI 1.0.6 and sharp 0.35.3 commands, 72 raw runs, three-run medians, retained failures and visual checks

## Blog

- [PiPic Blog](https://pipic.cc/blog): notes on image compression, web performance and building tools for designers and their agents. Articles are also translated into 中文, 日本語, Español and Deutsch — same slug under the language prefix, e.g. https://pipic.cc/zh/blog
- [How to reduce AVIF file size without changing the format](https://pipic.cc/blog/how-to-reduce-avif-file-size): A practical way to compress AVIF files, keep their dimensions and format, check visual quality, and ship smaller images without guessing.
- [Squoosh CLI, imagemin, sharp, or PiPic: the 2026 image-CLI check-up](https://pipic.cc/blog/choosing-an-image-compression-cli): Squoosh's CLI crashes on today's Node, and imagemin "minified" a 12-byte text file with exit 0. We ran the CLIs everyone recommends against one folder.
- [Compress images in GitHub Actions](https://pipic.cc/blog/compress-images-in-github-actions): A workflow that compresses new images on every pull request and commits the result back — plus the quota maths nobody mentions until it bites.
- [Give your coding agent an image compressor with PiPic Skill](https://pipic.cc/blog/give-your-coding-agent-an-image-compressor): Install PiPic CLI and its agent skill once, then ask Codex, Claude Code or Cursor to compress images in plain English.
- [Sixty images, and your compressor takes twenty at a time](https://pipic.cc/blog/most-free-compressors-stop-at-twenty): We checked ten free compressors. The ones that count images almost all stop at twenty, and the best known of them rejects anything over 5 MB.

## FAQ

**Which formats can I compress?**
JPG, PNG, WebP and AVIF — same format in, same format out, covering everything the modern web runs on.

**How many images can I compress at once?**
Up to 100 images per batch, with each file up to 8 MB. Need more? Just run another batch — it stays free.

**What happens to my images?**
Your images are uploaded securely, compressed, and deleted immediately afterward. We don't keep copies, share them, or use them for anything else.

**Will quality noticeably drop?**
We tune the default for a near-invisible loss. You keep the original dimensions and can always re-download the source.

**Is it really free?**
Yes — PiPic is 100% free with no sign-up. Compress as many images as you like.

## Format-specific FAQ

**Does compressing a PNG remove its transparency?**
No. The alpha channel is preserved through compression, so transparent backgrounds and soft edges look exactly the same afterwards.

**How much smaller will my PNG get?**
It depends on the image, but 60–80% savings are typical for screenshots, logos and UI graphics. You see the exact number for every file before downloading.

**Is the result still a normal PNG file?**
Yes — you get a standard .png back with the same dimensions, ready to use anywhere a PNG works.

**Will my JPG lose quality when compressed?**
JPG compression is lossy by nature, but PiPic keeps the loss below the visible threshold at normal viewing sizes. Keep your originals for archival work; use the compressed copy for web, email and sharing.

**What's the difference between JPG and JPEG?**
None — they are the same format. ".jpg" is just the old three-letter spelling of ".jpeg". PiPic handles both.

**Do the image dimensions change?**
No. Width and height stay exactly the same — only the file size shrinks.

**Is it worth compressing WebP if the format is already efficient?**
Usually yes. Export settings tend to be conservative, so re-optimizing typically saves another chunk of the file size with no visible difference.

**Does the output stay WebP?**
Yes — WebP in, optimized WebP out, with the same dimensions and transparency handled cleanly.

**Should I use WebP instead of JPG or PNG?**
For the web, usually yes: WebP is smaller at the same quality and supported by every modern browser. PiPic compresses all four formats, so you can optimize whatever your project already uses.

**Can I reduce AVIF file size further?**
Usually. AVIF export settings are often conservative, so recompressing can remove more bytes. PiPic keeps the original when a compressed result would not be smaller.

**Does the output stay AVIF?**
Yes — AVIF in, optimized AVIF out, at the same dimensions. The format never changes on you.

**Should I use AVIF instead of WebP or JPG?**
AVIF is a strong choice for modern browsers, especially for photographic images. If you support older software, keep a WebP or JPG fallback. PiPic compresses each format without converting it.

## Brand & contact

- Name: PiPic
- Full name: PiPic Image Compressor
- Official developer tool: PiPic Agent CLI (`@pipic/cli`)
- Website: https://pipic.cc/
- [GitHub organization](https://github.com/PiPic-cc): official PiPic source-code organization
- [npm package](https://www.npmjs.com/package/@pipic/cli): official PiPic Agent CLI package
- Contact: contact@pipic.cc
- Languages: English (https://pipic.cc/), 中文 (https://pipic.cc/zh/), 日本語 (https://pipic.cc/ja/), Español (https://pipic.cc/es/), Deutsch (https://pipic.cc/de/)