Free tools · no signup
Free software, AI and developer tools.
Calculators and utilities for planning, pricing and building software. Each one opens on a worked example and shows the answer on the page, with no signup and no email.
5 tools
Cost, planning and finance
What a build costs, when it pays for itself, how to account for it and how to brief a vendor.
Software development cost calculator
A typical cost and timeline range for your project, by type, scope and features.
Software development quote comparison
Two to four development quotes side by side: cost per week, missing items and questions to ask.
Software RFP generator
Write a requirements brief and RFP vendors can quote against, with MoSCoW features and weighted criteria.
Build vs buy calculator
Custom CRM or ERP against SaaS seats: the year a build breaks even, or how much SaaS saves you.
Software and website cost capitalization calculator
Capitalise or expense each software and website cost under US GAAP or IFRS, with amortization and journals.
6 tools
AI
What an AI feature costs to run, how many tokens it uses and whether AI crawlers can read your site.
LLM API pricing comparison and cost calculator
OpenAI, Claude, Gemini and more API prices per 1M tokens, with your monthly cost side by side.
LLM token counter and tokenizer
Count tokens for GPT, Claude and Gemini, see the split, and check the context window and cost.
AI agent and RAG cost calculator
What an AI agent and its RAG pipeline cost to run each month, and which line drives the bill.
AI crawler checker and robots.txt tester
Which AI crawlers your robots.txt lets in, GPTBot to PerplexityBot, with the line that decides each.
Robots.txt generator for AI crawlers
Build a robots.txt that blocks AI training crawlers, keeps AI search, or blocks every AI bot.
llms.txt generator and validator
Write an llms.txt from your site’s name, summary and key links, or check one against the proposal.
6 tools
Developer
Format, compare, convert and type JSON, in your browser.
JSON formatter, validator & minifier
Minify, format and validate JSON with exact error positions. Nothing is uploaded.
JSON viewer
Read JSON as a collapsible tree, search keys and values, and copy any node’s JSONPath.
JSON compare
Diff two JSON documents by value: key order and whitespace ignored, every change with its path.
JSON to CSV converter
Flatten an array of JSON objects into CSV with dot-path columns, preview it and download.
JSON Schema validator and generator
Validate JSON against a 2020-12 or draft-07 schema with each error’s path, or generate one.
JSON to TypeScript and Zod
TypeScript interfaces and a Zod schema from a JSON sample, with optional keys and unions.
FAQs · Free tools
Free tools · frequently asked questions
What they cost, what is sent to us, and where the numbers come from.
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