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Every Toolzami tool on one page, grouped by category. Each opens ready to use, with a guide and worked examples below the tool.

JSON Tools

  • JSON Formatter & Validator

    Format and validate JSON in your browser. Errors point to the line and column with a fix, and big numbers and duplicate keys stay as written.

  • JSON Viewer & Editor

    View JSON as a collapsible tree in your browser: search keys and values, copy JSONPath or JSON Pointer paths, and edit with a live tree.

  • JSON Minifier

    Minify JSON in your browser: drop whitespace and comments, keep every value exactly, and compare the size before and after gzip.

  • JSON to CSV

    Convert JSON to CSV in your browser: nested objects become columns, long numbers keep every digit, and cells that could run as formulas are escaped.

  • CSV to JSON

    Turn CSV into JSON in your browser, with the delimiter found for you, numbers and booleans typed by column, and zip codes and long IDs left as written.

  • JSON to YAML

    Convert JSON to YAML in your browser: block-style output for Kubernetes and CI files, numbers kept digit for digit, and values like no quoted for YAML 1.1.

  • YAML to JSON

    Convert YAML to JSON in your browser: anchors and merge keys expanded, several documents as an array or JSON Lines, and YAML 1.1 values like NO flagged.

Developer Tools

  • XML Formatter & Validator

    Format or minify XML in your browser and check that it is well-formed, with each error at its line and column. Comments, CDATA and mixed text stay as written.

  • Base64 Encoder & Decoder

    Decode Base64 to UTF-8 text or a file, or encode text and files in your browser. Works with URL-safe Base64, data URIs and PEM, and pinpoints bad characters.

  • JWT Decoder

    Decode a JSON Web Token in your browser: header, payload and claims with their dates, whether it has expired, and warnings for alg none and risky claims.

  • Unix Timestamp Converter

    Convert Unix epoch timestamps to dates and back, in seconds, milliseconds, microseconds or nanoseconds, in any time zone, with daylight saving gaps flagged.

  • SQL Formatter

    Format SQL in your browser for PostgreSQL, MySQL, SQL Server, Oracle, BigQuery and 15 more dialects. Comments and placeholders stay; errors show their line.

AI & MCP Tools

  • LLM Cost Calculator

    Estimate what an AI feature costs per request, day, month and year on OpenAI, Claude, Gemini and more, with cached and batch prices and their sources.

  • AI Token Counter

    Count tokens in your browser: exact for GPT models with OpenAI's o200k_base and cl100k_base tokenizers, estimated for Claude, Gemini, DeepSeek and Mistral.

  • MCP Config Generator

    Write or convert MCP server configs for Claude Desktop, Claude Code, Cursor, VS Code, Devin and Codex, and add servers to the file you already have.

  • MCP Config & Schema Validator

    Check MCP configs for Claude, Cursor, VS Code and Codex, and MCP server tool schemas against the spec, with the line of each problem and a fix where safe.

SEO Tools

  • Meta Title & Description Checker

    See how your title and meta description show in Google results on desktop and mobile, measured in pixels, with where they get cut and what to fix.

  • Schema Markup Generator

    Create JSON-LD for articles, organizations, FAQs and breadcrumbs, checked against Google's documentation, with valid URLs and dates and script-safe text.

  • UTM Builder

    Add UTM parameters to any link with consistent lowercase naming, keep its query and # part, and check a campaign URL for mistakes that break GA4 tracking.

  • Robots.txt Validator

    Check robots.txt line by line against RFC 9309 and Google's rules, and test any URL for Googlebot, GPTBot, ClaudeBot or your own user agent.