All Tools - Page 5

JPG to PNG Converter

Convert JPG images to PNG format with transparency support. Upload your JPG files and download them as PNG images with lossless quality.

JPG to SVG Converter

Trace raster JPG/JPEG images into scalable SVG vectors. Colour, greyscale and black-and-white modes, adjustable detail and smoothing, a side-by-side JPG vs SVG preview, the path count of the trace, and an honest size comparison — traced SVGs are usually larger than the JPEG.

JPG to WebP Converter

Convert JPG images to WebP format for faster web performance. Reduce file sizes by up to 80% while maintaining quality for modern web applications.

JS Formatter / Minifier

Beautify or compress JavaScript code snippets. Format JavaScript for readability or minify it for production use. Useful for code optimization and development.

JSON Diff Tool

Compare two JSON inputs to see changes and differences. Highlights additions, deletions, and modifications with clear visual indicators.

JSON Formatter

Format, validate, and beautify JSON data. Quickly view readable JSON for use in development and debugging.

JSON Schema Generator (with AI Tool-Call Builder)

Generate JSON Schema, TypeScript types, Zod schemas, and Python TypedDicts from sample JSON. Build OpenAI, Anthropic, and Gemini tool-call schemas with a visual parameter editor. 100% in your browser.

JSON to CSV Converter

Convert JSON data to CSV format with multiple input options. Paste JSON data, load from URL, or upload a file to convert to CSV.

JSON to HTML Converter

Turn JSON into clean, embeddable HTML: a flat table, nested

/
• lists, a

  /

  /

  description list, or semantic markup that maps objects to description lists and arrays to ordered lists. Every value is HTML-escaped, the result renders in a sandboxed preview next to its source, and you can copy the markup or download a standalone page.

  Use Tool

JSON to Python Converter

Convert JSON data into Python dataclasses or plain typed classes. Infers types from values, handles nested objects, arrays, and optional fields, with optional to_dict/from_dict JSON helpers. Powered by quicktype-core.

JSON to TSV Converter

Convert JSON data to TSV (Tab-Separated Values) format with multiple input options. Paste JSON data, load from URL, or upload a file to convert to TSV.

JSON to TypeScript

Convert JSON data into TypeScript interfaces. Infers types from values, handles nested objects, arrays, and optional fields. Powered by quicktype-core.

JSON to XML Converter

Convert JSON data to XML format with multiple input options. Paste JSON data, load from URL, or upload a file to convert to structured XML.

JSON to YAML Converter

Convert JSON data to YAML format with multiple input options. Paste JSON data, load from URL, or upload a file to convert to YAML.

JSON Validator

Validate JSON input for proper structure and syntax. Format, minify, and analyze JSON data. Perfect for debugging API payloads or configuration files.

JWT Decoder

Paste a JWT (JSON Web Token) and decode its header and payload. Useful for developers to inspect JWT contents without verification.

JWT Encoder

Create and encode JSON Web Tokens (JWT) with custom header, payload, and secret key. Perfect for developers testing JWT implementation.

Key Pair Generator

Generate cryptographically-secure Ed25519, ECDSA, and RSA key pairs entirely in your browser. Export real OpenSSH private keys (openssh-key-v1), PKCS#8/SPKI PEM with optional PBES2 passphrase protection, or JWK for JWKS endpoints — complete with SHA256/MD5 fingerprints, OpenSSH randomart, and a sign-and-verify check that proves the two halves match. Keys are generated via the Web Crypto API, the same primitives browsers use for TLS, and never leave your device.

Leap Year Checker

Check if any year is a leap year and explore leap year patterns. Find next and previous leap years with detailed explanations of the leap year rules.

Length Converter

Convert between different units of length measurement including millimeters, centimeters, meters, kilometers, inches, feet, yards, miles, and more. Quick and accurate length conversions.

Line Break Remover / Adder

Add or remove line breaks from text. Useful for formatting text, converting between single-line and multi-line formats, or preparing text for different contexts.

List Randomizer & Picker

Shuffle a list, draw random winners, or split people into balanced teams. Supports weighted entries, reproducible seeds, sequential raffle draws with history, and a shareable link — all in your browser, with no data sent anywhere.

LLM Token Counter & Cost Estimator

Count tokens for any LLM prompt and estimate API cost across GPT-5, Claude 4.7, Gemini 3, Grok 4, DeepSeek R1, and Llama 4. Visualise tokens, see context-window utilisation, and compare models side-by-side — all in your browser.

Lorem Ipsum Generator

Generate placeholder text for design or testing. Create Lorem Ipsum text with customizable paragraphs, words, and sentences.