# RoundCut

> RoundCut is a free image-tools site. 9 live tools today (7 general tools + 2 family hubs; the converter covers 12 convert format pairs) across 29 locales. Different tools have different architectures: some run entirely in your browser, some use a hybrid client-preview / server-encode model, some need cloud inference. Each tool's page describes its own architecture honestly.

## Tools (live)

- [Remove Background](https://roundcut.app/background-remover/): Remove the background from a JPG, PNG, or WebP photo and get a clean cutout in seconds. Download a transparent PNG, a lighter WebP, or a white-background JPEG.
- [Circle Crop](https://roundcut.app/): Make photos and images round for profile pictures, avatars, logos, and PFPs. Export as PNG, WebP, AVIF, or JPEG.
- [Compress Image](https://roundcut.app/compress/): Compress one image or many at once and keep each ones format, smaller files in a click.
- [Crop Image](https://roundcut.app/crop-image/): Crop JPG, PNG, WebP, or AVIF to any aspect ratio, 1:1, 16:9, 9:16, 4:5, or pixel-exact dimensions you type in.
- [JPG to PDF](https://roundcut.app/jpg-to-pdf/): Combine JPG photos into one PDF, fast and free.
- [Resize Image](https://roundcut.app/resize/): Resize JPG, PNG, WebP, or AVIF by pixels or percent. High-quality resampling with aspect ratio lock.
- [AI Image Upscaler](https://roundcut.app/upscale-2x/): Sharpen and enlarge your photo in seconds. Free.
- [Crop (hub)](https://roundcut.app/crop/): Pick your crop type — circle for avatars and profile pictures, or a free rectangle with aspect-ratio presets and pixel-exact sizes. Routes to a purpose-built child tool per type; today those are Circle Crop and Crop Image.
- [Convert (hub)](https://roundcut.app/convert/): Pick a format pair (AVIF/JPG/PNG/WebP in 12 directions) and convert in your browser. Each pair has its own page below.

## Convert format pairs (live)

- [AVIF to JPG](https://roundcut.app/avif-to-jpg/): Turn an AVIF photo into a universal JPG and open it anywhere.
- [AVIF to PNG](https://roundcut.app/avif-to-png/): Convert an AVIF into a lossless PNG that opens in any app, with transparency intact.
- [AVIF to WebP](https://roundcut.app/avif-to-webp/): Convert AVIF to WebP locally when you need broader app support without going all the way to PNG.
- [JPG to AVIF](https://roundcut.app/jpg-to-avif/): Turn a JPEG into a featherweight AVIF and shrink photos by 40 to 86 percent.
- [JPG to PNG](https://roundcut.app/jpg-to-png/): Re-wrap a JPG as PNG for exact-quality editing and tool compatibility. Expect a larger file.
- [JPG to WebP](https://roundcut.app/jpg-to-webp/): Turn any JPEG into a lighter WebP and cut file size by 25 to 34 percent. Drop one file or several at once.
- [PNG to AVIF](https://roundcut.app/png-to-avif/): Drop a PNG and get an AVIF that keeps your alpha channel while cutting file weight on photographs.
- [PNG to JPG](https://roundcut.app/png-to-jpg/): Drop PNG to JPG for photos, email attachments, and uploads where smaller files matter.
- [PNG to WebP](https://roundcut.app/png-to-webp/): Convert PNG to WebP with transparency preserved and a smaller file size.
- [WebP to AVIF](https://roundcut.app/webp-to-avif/): Convert WebP to AVIF and get photographs that run 20 to 30 percent smaller, with transparency kept.
- [WebP to JPG](https://roundcut.app/webp-to-jpg/): Turn a WebP into a standard JPG for email, Instagram, and apps that still want JPEG. Works right in the tab, no install needed.
- [WebP to PNG](https://roundcut.app/webp-to-png/): Convert WebP to PNG so Photoshop, Word, and older apps can open the file. Transparency kept.

## Blog (recent 25 of 161)

Editorial posts on image tooling, format choice, e-commerce photography, and AI photo workflows. English edition at /blog/; the Portuguese (pt-BR) edition (256 posts) lives at [https://roundcut.app/blog/pt/](https://roundcut.app/blog/pt/).

- [Substack Logo Size Guide 2026: A Clean 256px Mark](https://roundcut.app/blog/substack-logo-size-256px-transparent-background/) (2026-10-29): Make a clean Substack logo with the right 256px square, transparent background, and a separate wordmark that doesn't get squeezed.
- [Why Colored Text Blurs in JPEG (Black Text Doesn't)](https://roundcut.app/blog/colored-text-blurry-jpeg-subsampling-measured/) (2026-10-24): Red headlines fringe as JPG while black text stays crisp. I measured both at quality 85, plus the formats that fix it without doubling your file size.
- [Why Your PNG Got Bigger After Editing: 5 Causes Measured](https://roundcut.app/blog/png-bigger-after-editing-five-causes-measured/) (2026-10-21): Your PNG grew because the edit changed what the file stores, not how it looks. I measured all five causes in bytes, plus the fix that gave back 86% of it.
- [Does Cropping a Photo Delete It? I Tested What Survives](https://roundcut.app/blog/does-cropping-a-photo-delete-it-tested/) (2026-10-18): A crop removes pixels only when your editor writes a new file. I measured four cases, from alpha masks to leftover bytes, and what clears each one.
- [Washed-Out Photo Colors After Upload: the Missing Tag](https://roundcut.app/blog/photo-colors-washed-out-after-upload-srgb/) (2026-10-14): Photo colors look washed out after upload because the color profile got dropped, not because of compression. Measured: how far each color moves, and the fix.
- [Logo Avatars: the Pixel Size Where a Wordmark Fades](https://roundcut.app/blog/logo-avatar-pixel-size-wordmark-fades/) (2026-10-09): A nine-letter wordmark keeps solid ink down to a 52-pixel avatar, a stacked lockup needs 72 and a monogram holds at 18. Measured, with the rule behind it.
- [6 AI Background Remover Tools in 2026: Price & Speed](https://roundcut.app/blog/6-ai-background-removal-tools-compared-2026-speed-price/) (2026-04-07): Background remover tools in 2026 range from free to $0.07 per image. Compare Photoshop, VectoSolve, Rembg, and RoundCut on price, speed, and edge quality.
- [Instagram Profile Picture Size: 360 x 360 Pixels](https://roundcut.app/blog/instagram-profile-picture-size-a-guide-for-a-perfect-crop/) (2026-01-30): The right Instagram profile picture size is 360 x 360 pixels, a square image centered for the app's automatic circle crop. Here's how to get it right.
- [JPEG Quality 80 Across Four Encoders: Measured](https://roundcut.app/blog/jpeg-quality-80-four-encoders-measured/) (2026-10-05): Quality 80 wrote files within 0.8% of each other in four JPEG encoders. The 2x spread came from the default nobody sets. Measured on four test images.
- [Transparent PNG White Outline After Resizing: Measured](https://roundcut.app/blog/transparent-png-white-outline-after-resizing-measured/) (2026-10-02): A white outline on a resized transparent PNG is rarely the resizer's fault. I measured three of them, found the real cause, and cleaned the ring in one pass.
- [How to Circle a Photo on iPhone](https://roundcut.app/blog/how-to-crop-circle-on-iphone-keep-important-parts/) (2026-07-28): To circle a photo on iPhone, crop it into a round shape with Photos and RoundCut, or draw a circle around a detail using Markup. Steps for both.
- [How to Reduce a Photo's MB Size on iPhone](https://roundcut.app/blog/how-to-reduce-photo-file-size-on-iphone/) (2026-06-20): To reduce a photo's MB size on iPhone, resize it in Preview first, then compress or convert only if the upload still needs a smaller file.
- [AI Background Removal in Batch: 2026 Proof Checklist](https://roundcut.app/blog/free-ai-background-remover-2026-proof-checklist/) (2026-05-05): A 6-minute test for batch AI background removal in 2026: check edges, real PNG alpha, shadows, and throughput before trusting a tool with 50 images.
- [Image Blurry After Resizing? I Measured Four Filters](https://roundcut.app/blog/image-blurry-after-resizing-filters-measured/) (2026-09-27): Your image looks blurry after resizing because a 4x reduction drops 15 of every 16 pixels. I measured four filters, the browser canvas, and the real fix.
- [Profile Picture File Size Limits 2026: Why Uploads Fail](https://roundcut.app/blog/profile-picture-file-size-limits-upload-failed/) (2026-09-24): Profile picture upload failed? Five platforms publish three different ceilings, from GitHub's 1 MB to YouTube's 15 MB. One 512-pixel export clears them all.
- [Slack Profile Picture Size: 512x512 or 1024x1024](https://roundcut.app/blog/slack-profile-picture-size-crop-clear-avatar/) (2026-06-18): A Slack profile picture should be square, 512x512 to 1024x1024 pixels. Here is how to crop, mask for the circle, and export the right file type.
- [How to Reduce Photo File Size on Android Phone](https://roundcut.app/blog/reduce-photo-file-size-on-android/) (2026-07-17): Crop dead space in Google Photos, resize in Samsung Gallery, then compress the copy to shrink an Android photo's file size fast.
- [AI Background Removal Tools for Batch Processing (2026)](https://roundcut.app/blog/top-10-ai-background-removal-tools-2026-throughput/) (2026-05-08): Compare 10 AI background removal tools for 2026 batch jobs: edge accuracy on hair/fur, true batch processing, API access, and pricing traps to avoid.
- [Profile Picture Safe Zone Guide 2026: Six Masks, Measured](https://roundcut.app/blog/profile-picture-safe-zone-six-platform-masks/) (2026-09-19): A circular avatar mask deletes 21.46% of your square upload. I read the rendered CSS on six public profile pages and measured what actually survives it.
- [Google Meet Photo Guide 2026: Fix the Shared Account Crop](https://roundcut.app/blog/google-meet-photo-shared-account-crop/) (2026-09-16): Fix a Google Meet photo with a circle-safe crop that stays sharp and updates through your shared Google Account.
- [Change a Substack Profile Picture Without a Tiny Logo](https://roundcut.app/blog/change-substack-profile-picture-without-tiny-logo/) (2026-09-11): Change your Substack profile picture with a square source, a circle preview, and a logo test that stays legible on a phone.
- [What People Actually Upload to Image Tools: 36,038 Files, 29 Days](https://roundcut.app/blog/what-people-actually-upload-to-image-tools-2026/) (2026-09-08): Original data from RoundCut: format share (JPG 57%, PNG 32%, AVIF 5%), file sizes (75% under 1 MB), HEIC on iOS, and how uploads differ by country and device.
- [How to Fix the eBay 'Upload Failed, Try Again' Error](https://roundcut.app/blog/fix-ebay-photo-upload-errors/) (2026-06-23): eBay's 'Upload failed, try again' error usually means one photo fails a size, format, weight, or background check. Fix the file, then retry.
- [WhatsApp Business Cover Photo Size: Profile Guide](https://roundcut.app/blog/professional-whatsapp-business-profile-photo-2026-guide/) (2026-06-16): There's no WhatsApp Business cover photo, only a profile picture. The size is 1080 x 1080 pixels, square PNG or JPG, shown as a circle in the app.
- [Twitter (X) Archive: How to Download Your Data](https://roundcut.app/blog/how-to-archive-tweets-a-complete-guide-for-x-twitter/) (2026-03-16): A Twitter archive is a ZIP of your tweets, DMs, and photos from X's own settings. Here's how to request one and what you'll find inside it.

For the full archive: [https://roundcut.app/blog/](https://roundcut.app/blog/) · Per-post markdown, indexed: [https://roundcut.app/blog/llms.txt](https://roundcut.app/blog/llms.txt) (English) · [https://roundcut.app/blog/pt/llms.txt](https://roundcut.app/blog/pt/llms.txt) (Portuguese) · Raw markdown corpora: [https://roundcut.app/llms-blog-en.txt](https://roundcut.app/llms-blog-en.txt) · [https://roundcut.app/llms-blog-pt.txt](https://roundcut.app/llms-blog-pt.txt) · RSS: [https://roundcut.app/blog/rss.xml](https://roundcut.app/blog/rss.xml)

## Catalog and reference

- [Tools directory](https://roundcut.app/tools/): All live tools + roadmap.
- [How it works](https://roundcut.app/how-it-works/): Architecture overview — why some tools run client-side, why others use server-side encoders, what data leaves your device on each path.
- [About](https://roundcut.app/about/): Project background, principles, what we do and don't do.
- [Privacy](https://roundcut.app/privacy/): What data each tool's path sends, how long it's kept, who can see it.
- [Terms](https://roundcut.app/terms/): Service terms.
- [Contact](https://roundcut.app/contact/): Get in touch.
- [llms-full.txt](https://roundcut.app/llms-full.txt): Full content of every tool page, every format-conversion page and every institutional page, in markdown. Each entry carries a `Source:` line with its canonical URL.
- [llms-blog-en.txt](https://roundcut.app/llms-blog-en.txt): Full English blog corpus in raw markdown (161 posts).
- [llms-blog-pt.txt](https://roundcut.app/llms-blog-pt.txt): Full Portuguese (pt-BR) blog corpus in raw markdown (256 posts).

## Locales

Site is available in 29 languages: English is the default. Tool pages are tool-first — `/<tool>/<locale>/`, e.g. `/compress/pt/`. Institutional pages are locale-first — `/<locale>/<page>/`, e.g. `/pt/about/`. Locales: ar, bg, ca, da, de, el, es, fi, fr, hi, id, it, ja, ko, ms, nl, no, pl, pt, ru, sv, ta, th, tr, uk, vi, zh-CN, zh-TW.