Free online tools, and experience we actually earned
This is the official site of Xi'an Aiya Qinya Electronic Technology Co., Ltd. We build mini programs and tool products, and this site is where that work becomes reusable: eight instant-use web tools plus in-depth practice articles, all drawn from projects we shipped. Every tool runs locally in your browser — your data never leaves your device.
free tools
practice articles
data uploaded
Online Tools
Open and use — no sign-up, and everything stays in your browser.
Practice Articles
Retrospectives and handbooks from real projects: payment migration, mini-program compliance, SEO fundamentals, and productivity toolchains.
Between bulk generation and human editing: our content pipeline
Bulk-generated content gets flagged; purely manual is slow and expensive. Our pipeline: machine drafts, human authority, realistic cadence.
A hands-on method for evaluating AI cutout edge quality
Hair, glassware, cluttered shelves: the three hard scenes for AI cutouts. A reproducible edge-quality evaluation method, plus what our tool bake-off found.
Static-site SEO fundamentals: sitemap, internal links, and crawl speed — measured
No tricks: five baseline moves that doubled Google's indexing speed on our static sites within three weeks — each with its own verification method.
Windows office automation: a three-layer scheme of scheduler, scripts, and logs
Any fixed daily computer routine can be automated. Our three-layer scheme: Task Scheduler as the skeleton, scripts for the dirty work, logs for safety.
From an AdSense 'low value content' rejection to a rebuild: what actually changed
'Your site isn't ready to show ads.' After a low-value-content rejection, here is how we diagnosed, rebuilt, and which changes actually mattered.
Mini-program virtual payments and rewarded ads: where the compliance line sits
Coins, memberships, ads: where the compliance boundaries of mini-program virtual monetization actually sit — what works, and what never will.
Mini-program review rejections: the compliance checklist we built from ours
Rejections are rarely bad luck. A retrospective of every rejection across three of our mini programs, distilled into the checklist we now run before every release.
Choosing a cross-border payment stack as an indie developer
Choosing a cross-border payment stack as an indie developer: subscriptions, one-off sales, and settlement — with real fees and timelines.
The complete manual for slimming a Git repository and purging secrets
A 3 GB repository, ten-minute clones, secrets still living in history? The complete Git slimming and history-rewrite manual, with verification steps.
Excel performance tuning for 100k-row data: three fixes, measured
A hundred-thousand-row workbook freezing solid? Formula surgery, Power Query, and the data model — three optimization tiers with measured timings.
uni-app: ten real pitfalls moving from web to WeChat Mini Program
One uni-app codebase, two platforms. Ten real pitfalls we hit moving from H5 to WeChat Mini Program — each reproduced and fixed on real devices.
Migrating to WeChat Pay APIv3: the three days behind a 'signature error'
A new merchant account kept returning 'signature error' on every unified order. The full story of migrating a storefront from WeChat Pay APIv2 to APIv3.