Steps, FAQ and tips for every tool.
Shrink image file size with near-zero quality loss. Great for websites, email attachments, chat.
💡 Use JPEG/WebP for photos, PNG for screenshots/icons, AVIF for smallest size.
Open tool →Convert between PNG / JPG / WebP / AVIF / ICO — no install required.
💡 ICO is for website favicons; export is auto-scaled to ≤256×256.
Open tool →Batch resize by exact dimensions, percent, or long edge.
💡 Use Long edge mode for consistent thumbnails (e.g., long edge 1920px).
Open tool →Free crop or aspect-ratio crop (1:1 / 4:3 / 16:9 etc.) for a single image.
💡 Use 1:1 for square avatars; 9:16 for vertical video covers.
Open tool →Rotate 90/180/270 or flip horizontally / vertically — batch supported.
💡 Quick fix for scanned docs — just rotate 90.
Open tool →Add a text watermark with position or full-image tile.
💡 Tile + 30° tilt is hardest to crop out.
Open tool →17 ID-photo specs: 1-inch / 2-inch / passport / US visa + China-specific docs (driving licence, e-driving licence, residence permit, student / party card, teacher / health cert, HK-Macau permit, marriage / officer card). Auto A4 layout for printing.
💡 White is RGB(255,255,255); blue uses #2c84df, red uses #e74c3c — the three official colours. Marriage / officer card are landscape and the A4 layout adapts automatically.
Open tool →One-shot generate WeChat article cover main + thumbnail with consistent subject.
💡 16:9 source images work best; vertical images get center-cropped.
Open tool →Generate the full set of website icons (including .ico, apple-touch-icon, android-chrome) in one pass.
💡 Non-square sources are centre-cropped to 1:1 automatically. To preserve all content, crop to 1:1 first using the Crop tool.
Open tool →Cut one large image into multiple tiles — Moments 9-grid, RED collage, Instagram carousel.
💡 For Moments 9-grid, centre-crop to 1:1 first so previews are not stretched.
Open tool →Compress tall detail images / long screenshots while keeping the original width.
💡 For e-commerce upload, keep each segment ≤ 2000 px tall to avoid platform re-compression and upload timeouts.
Open tool →Merge 2-9 images into one: comparisons, product grids, 9-grid shares, photo sets.
💡 Match template to image shape: 2×2 / 3×3 for same-aspect sets; 1×2 / 1×3 for landscapes; 2×1 / 3×1 for portraits.
Open tool →One-click AI background removal: portraits, products, pets. Browser-local, zero upload, zero tracking.
💡 Cutouts are most stable below 1080×1080. For larger sources, resize the long edge to about 1500 px first via the Resize tool.
Open tool →Put front and back of a Chinese ID card on the same A4 at the real 85.6×54mm card ratio — one print job at any print shop.
💡 Watermarking is strongly recommended: a diagonal tile across the whole sheet makes screenshot misuse obvious.
Open tool →RED / Xiaohongshu cover at 3:4. Drag to recompose, with bottom title safe-area guide.
💡 RED overlays your title text + tags at the bottom, so keep the subject in the upper half.
Open tool →Douyin (TikTok-CN) cover at 9:16 with top-status, right-action and bottom-caption safe-area overlays.
💡 Right action bar (like/comment/share) is always shown — keep important text out of the right 15% of the frame.
Open tool →Taobao / Tmall main product image at 1:1 (800 / 1200 / 1500). 1500 unlocks the zoom feature.
💡 Taobao requires 1:1 and long edge ≥ 800. PNG preserves transparency; JPG is forced to white.
Open tool →Chinese business-license scan layout: auto-trim white margins, centre on A4, optional anti-misuse watermark.
💡 Scans of stamped (chop) license copies tend to have noisy white borders — auto-trim cleans them up before centring.
Open tool →WeChat Channels cover at 6:7 (1080×1260).
💡 WeChat overlays the video title in the bottom strip — keep the subject in the top half.
Open tool →Bilibili 16:9 cover, required for video uploads.
💡 Bilibili also stamps a category badge — keep title text out of the top 5%.
Open tool →YouTube thumbnail at standard 1280×720.
💡 YouTube recommends ≤ 2MB — pair with the Compress tool if needed.
Open tool →Douyin (TikTok-CN) photo-mode cover at 4:5 (1080×1350).
💡 Every image in a photo-mode post should keep 4:5 or it'll be cropped.
Open tool →Resume / job-board headshots: CN resume sites, BOSS Direct, LinkedIn.
💡 White background works for most job boards; LinkedIn recommends a 400×400 square avatar.
Open tool →Merge WeChat / Alipay / bank QR codes into a single sheet for printing.
💡 Horizontal fits a counter-top stand; vertical fits a phone-screen share.
Open tool →Convert a scanned red stamp on white paper to a transparent PNG for digital contracts.
💡 High-DPI scans give the cleanest result; phone photos can drift pink — bump hue tolerance to 35.
Open tool →Redact IDs, plates, faces or screenshots with pixel mosaic or blur.
💡 Re-compress and clean EXIF afterwards — both strip lingering metadata around the redacted area.
Open tool →Image → ASCII art for chats, blogs, README banners.
💡 High-contrast portraits/silhouettes work best. Use Unicode blocks for messaging apps that monospace narrowly.
Open tool →Merge images into one PDF — contracts, receipts, reading notes.
💡 For scanned contracts: A4 + auto orientation + contain. For notes: fit-to-image with zero margin.
Open tool →URL / text → QR for links, payment notes, WiFi credentials.
💡 When adding a logo, ECC must be H (auto-set) and the logo should cover ≤22% of the QR area for scans to work.
Open tool →Image ↔ Base64 — inline tiny icons in CSS, embed in email, paste into chat.
💡 Base64 is ~33% larger than the file. Only worth inlining icons under ~10KB; use a real image host for larger assets.
Open tool →Inspect and strip GPS, camera, and timestamp metadata from your photos.
💡 Phone photos almost always include GPS — run this before posting to social media or selling items second-hand. Lossless vs. re-encoding.
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