The tool site where you decide

Free mortgage calculator supporting equal payment and equal principal repayment. Instantly see monthly payment, total interest, total repayment and full amortization schedule.

Enter a birth date to instantly compute exact age in years/months/days, Chinese nominal age, total days/hours lived, days to next birthday and zodiac sign. All computed locally.

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.

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.

Enter monthly pension, service years, retirement age, and province to simulate the 2026 pension adjustment — flat ¥46, tiered service-year bonus (¥1.0–2.5/year), level-linked ratio (1.0–1.5% by province), and senior bonus (¥40–100 from age 65). Fully browser-local.

Calculate your monthly China personal income tax under the 2025 comprehensive-income cumulative-withholding method. Supports salary, social insurance, itemized deductions and start month, with a monthly schedule.

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.

Calculate 2026 China property deed tax with the new MOF policy: 1% flat rate for first home, tiered rates for second home, 90sqm bracket and tier-1 city differences supported

Convert your current-year Gaokao provincial rank to an equivalent rank in last year's pool using the equi-percentile method, with reach/match/safety bands to shortlist universities.

Estimate monthly living costs across housing, food, transport, telecom and flexible spending by city tier, rental mode and commute, then back-solve the salary needed for a 30% savings rate target.

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.

Calculate 2026 China property deed tax with the new MOF policy: 1% flat rate for first home, tiered rates for second home, 90sqm bracket and tier-1 city differences supported

Convert your current-year Gaokao provincial rank to an equivalent rank in last year's pool using the equi-percentile method, with reach/match/safety bands to shortlist universities.

Estimate monthly living costs across housing, food, transport, telecom and flexible spending by city tier, rental mode and commute, then back-solve the salary needed for a 30% savings rate target.

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.

Enter your age, salary, contribution years, and city to forecast your monthly pension at retirement. Includes 2025 gradual retirement delay reform, basic vs personal account pension breakdown, and comparison across contribution tiers. Fully browser-local.

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.

Estimate your blood alcohol concentration (BAC) curve with the Widmark formula. Enter gender, weight, drink type and volume to see when you can legally drive under China's 20/80 mg/100ml limits.

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.

Estimate your 2026 EV out-the-door price in seconds: combine the renewed purchase-tax exemption, trade-in subsidy, local incentives and dealer discount into one transparent figure. Runs locally in your browser; no data uploaded.

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.

Count down China's next fuel price adjustment window based on the NDRC 10-working-day cycle. Combine tank capacity, remaining fuel and expected change to decide whether to fill up now or wait. Supports 92/95/98 gasoline and 0# diesel.

Enter scores for the 2026 FIFA World Cup 48-team, 12-group stage. Auto-calculates points, goal difference, head-to-head tiebreakers and the 8 best third-placed cross-group rankings to project Round-of-32 qualification.

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.

Calculate baby height, weight, head circumference and BMI percentiles using WHO LMS standards (0-60 months). Supports China WS/T 423-2022 reference data and preterm corrected age. Tracks growth for boys and girls aged 0-5 years.

Calculate China residential electricity bills using tiered or time-of-use pricing. Select your province, enter monthly usage or peak/valley/flat hours, and instantly see a tier-by-tier cost breakdown plus total bill. Covers monthly and annual billing for individual and shared meters.

Calculate your 2026 personal income tax annual settlement with comprehensive income and special additional deductions support to accurately determine tax payable or refundable amount

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.

Calculate tiles, paint buckets, floor planks and baseboard length for your renovation. Enter room dimensions and get accurate quantities with industry-standard waste rates to control your purchasing budget.