In validation · demand check before any code

Developer Tools for AI-Coding Data — Fully Offline, Nothing Uploaded

LocalDevKit is a planned native macOS toolbox for the data chores AI-assisted coding creates every day: a JSON response too large for your editor, a log you cannot paste into a web tool because it contains tokens and customer data, a cURL command to turn into code, a prompt whose token count you are guessing. Every tool would run locally on your machine — no upload, no account, no subscription. It is not built yet. This page exists to answer one question first: which of these tools, if any, are worth building?

Why this shape

The category has real paid evidence: DevUtils, an offline Mac developer toolbox sold as a one-time purchase, was publicly reported by its author at about $5,500/month in late 2023. That proves the offline-toolbox model can sell, not that this specific tool set will.
Generic tools (JSON formatting, timestamps, Base64) are already covered well by free software. This idea only targets gaps free tools cover weakly: very large files, AI-coding data, and redaction before sharing.
Privacy is the product: logs, tokens, and prompts stay on your machine because there is no server to send them to.

Candidate tools (none of this exists yet — pick your top 3 when you register)

Streaming viewer and search for very large JSON and log files (hundreds of MB, no full load into memory)
cURL ↔ code converter (Python, JavaScript, Go, and others)
Local redaction: find and mask API keys, JWTs, emails, and IPs in logs before you share them
LLM token counter and cost estimator for prompts and files, offline
JSON diff focused on API responses (what actually changed, not formatting noise)
JWT decoder and inspector, fully local
Timestamp / cron / regex helpers tuned for log work
Markdown / HTML cleanup for copied AI output

The first version, if built, would ship at most 8 tools. Registrations decide which ones — that is the point of the top-3 question in the registration email.

Who this is for

Developers who work with AI coding tools daily and handle large JSON, logs, and prompts
Anyone who has hesitated before pasting a log into an online tool — that hesitation is the use case
If free online tools already cover your needs, you do not need this

Indicative price (not a live price — nothing is for sale, no payment is taken)

$19 one-time

Registering is just sending one email — no payment, no pre-order, no commitment to buy. Please pick your top 3 tools from the list above and say what you use today: those answers decide both whether this gets built and what ships first.

This app is not built yet. Development will only begin if 30 people join this waitlist by October 31, 2026; if that goal isn't met, the project will be dropped and every registrant notified by email. The price and threshold are test parameters for this validation, not market conclusions.

Questions

Can I use it now?
No. Nothing has been built; this page is the whole thing.

Does registering mean I have to buy it?
No. It only means "notify me if it launches". Decide when there is a real product to look at.

Why macOS first, and what about Windows?
The clearest paid evidence in this category is a Mac tool, and each platform gets its own native build rather than a cross-platform shell. Registrations are split by system so a strong Windows showing can change the order; a Windows version sold directly would not need a store account.

Why not just use free tools?
For most tasks, you should. This idea only survives if the large-file, AI-data, and redaction gaps are real for enough people — the waitlist is how that gets tested before any code is written.