# Bigjpg > Bigjpg is an AI image upscaling service for anime-style artwork, illustrations, and > photographs, with configurable enlargement and noise reduction. The official website is https://bigjpg.com/. The homepage handles uploads and payments. FAQ, pricing and the API reference now live on their own pages; consult those pages for current limits, quotas, upload sizes and API parameters. ## Product and help - [Homepage](https://bigjpg.com/): Upload workflow, before-and-after examples and app downloads. - [Chinese homepage](https://bigjpg.com/zh): Same workflow, Chinese interface. - [FAQ](https://bigjpg.com/faq): Supported images, enlargement quality, processing time, limits, accounts, downloads and what happens to uploaded files. - [API reference](https://bigjpg.com/api): API-key authentication, image upload, task creation, status queries, retry, and every error status the API returns. - [Plans](https://bigjpg.com/#price): Current prices and the differences between free and paid accounts. ## Blog - [All articles](https://bigjpg.com/blog): Guides, comparisons and engineering notes. - [Bigjpg API Tutorial: Batch Upscale Images with Python](https://bigjpg.com/blog/bigjpg-api-batch-upscale-python): A complete, runnable script that uploads images, creates enlargement tasks, polls for results and downloads them — plus the concurrency and error handling that keeps a 500-image job from failing halfway. - [Print Size Cheat Sheet: How Many Pixels You Need for A4, A3 and Posters](https://bigjpg.com/blog/print-size-dpi-ppi-cheat-sheet): 300 DPI, 200 DPI, pixel counts for A5 to A1 and 10×15 prints — plus why the old "72 DPI images cannot be printed" rule is wrong and pixels are all that matter. - [2x vs 4x vs 8x vs 16x: Which Upscale Factor Should You Choose?](https://bigjpg.com/blog/2x-4x-8x-16x-which-upscale-factor): The factor only decides one thing: how many pixels come out. Here is how to work backwards from your target, and when a higher factor makes the result worse instead of bigger. - [How to Upscale Anime Art, Wallpapers and Manga Scans](https://bigjpg.com/blog/upscale-anime-art-and-wallpapers): Why line art and flat colour survive upscaling better than photos, what pixel size a 4K or 8K wallpaper really needs, and the settings that keep outlines crisp instead of grey. - [Best AI Image Upscaler: Bigjpg vs waifu2x vs Real-ESRGAN vs jpgHD vs jpgHi](https://bigjpg.com/blog/ai-image-upscaler-comparison): We put the same twelve images through five upscalers — anime line art, a phone portrait, a badly compressed JPEG and a 300-pixel sprite — and wrote down what each one did — including the files where our own tools were not the right answer. - [How to Enlarge an Image Without Losing Quality](https://bigjpg.com/blog/enlarge-image-without-losing-quality): Why a blown-up image turns to mush, which settings actually change the result, and how to get a file that survives both a 4K screen and a print shop. ## Policies and trust - [Privacy policy](https://bigjpg.com/privacy_policy.html): How uploaded images, account information, and other personal data are handled. - [Terms of service](https://bigjpg.com/terms.html): Service conditions, paid plans, payments, and user responsibilities. - [Content policy](https://bigjpg.com/content_policy.html): Allowed and prohibited uploads and content-moderation rules. - [AI transparency](https://bigjpg.com/ai_transparency.html): How AI enhancement works and the limits of reconstructed detail. - [Copyright policy](https://bigjpg.com/copyright.html): Intellectual-property responsibilities and copyright complaint procedures. - [Report abuse](https://bigjpg.com/report_abuse.html): How to report prohibited content or misuse of the service. - [Security](https://bigjpg.com/security.html): Security practices and vulnerability reporting. ## Optional - [Sitemap](https://bigjpg.com/sitemap.xml): Every public URL, including the 19 language versions of the homepages, blog and FAQ pages.