Utility

Upload any portrait to create standard ID photos in one click. Auto background removal with blue/white/red swap, smart crop to passport/visa sizes and compression to target KB, fully local in browser.

Free online PDF to image converter. Convert PDF pages to JPG or PNG with custom DPI and page range. Batch export as ZIP. 100% browser-local processing, no upload, fully private and secure.

Free online image cropper supporting 1:1, 4:3, 16:9, 3:4, 9:16 fixed ratios and free crop. Drag to select or input exact pixel values. Pure browser Canvas, keeps PNG transparency, no upload.

Stitch multiple images vertically or horizontally into one long image locally in your browser. Drag to reorder, customize gap and background, export as PNG/JPG/WebP. No server upload.

Add text or logo watermarks to images locally in your browser. Supports 9-grid positioning, diagonal tiling, batch processing and PNG/JPG/WebP export. Perfect for ID cards and business licenses. Zero upload for full privacy.

Compress JPG, PNG and WebP images locally in your browser with batch upload, quality slider, format conversion and zip download. No server upload, fully private.

Convert images between PNG, JPG, WebP and AVIF locally in your browser. Batch processing, quality control, transparent-to-white fill and size limits, with zero upload for full privacy and speed.

Free online QR code generator for text, URLs, WiFi and vCard. Customize error correction level, size and colors, then download as PNG. All processing happens locally in your browser, no upload.

Online color format converter for HEX / RGB / HSL. Type any format, the other two sync instantly with live swatch preview. Runs entirely in your browser — nothing uploaded.

Online JSON formatter / minifier / validator with custom indent, lag-free large inputs, and structured error messages. Runs entirely in your browser — JSON never uploaded, safe for sensitive data.

Estimate API costs for GPT, Claude, Gemini, DeepSeek and Qwen LLMs with input/output token pricing, prompt caching discounts and USD-CNY conversion. Forecast daily, monthly and yearly bills to plan your AI product budget with confidence.

Check housing provident fund withdrawal limits for Beijing, Shanghai, Guangzhou, Shenzhen and 3 more cities. Covers 6 withdrawal scenarios — home purchase, loan repayment, rental, resignation, serious illness and retirement — with required materials and frequency rules.

Locked to China's 2026 May Day holiday (May 1–5). Check each day you worked overtime to instantly see per-day and total pay at the correct multiplier: 3× for statutory holidays (May 1–2) and 2× for compensatory rest days (May 3–5). Salary folded locally in your browser — no data uploaded.