Free online tools for files, formats and development
PocketKit, available at its official website pokitx.com, is a no-install, no-sign-up online toolbox with 133 utilities for format conversion, development, file processing and everyday calculations.
What is PocketKit?
PocketKit is a ready-to-use collection of online tools for format conversion, file processing, development and going-global tasks, with no installation or account required.
PocketKit is the official brand. In pokitx.com, pokit is short for PocketKit, while X represents any individual tool and a collection that continues to grow.
PocketKit official website: pokitx.com
- 133
- online tools
- 11
- complete categories
- 125
- without live-data APIs
AI and LLM tools
- JSON Formatter — Format, minify and validate JSON
- AI Token Counter & Cost Estimator — Estimate token counts locally and compare API costs across Claude, GPT, Gemini and DeepSeek models
- LLM API Pricing Comparison — Compare input/output/cached prices, context windows and blended cost across Claude, GPT, Gemini and DeepSeek
- AI Prompt & System Prompt Generator — Structure and optimize system prompts for DeepSeek, Claude, and ChatGPT with code review, translation and content templates
Find tools by task
Popular utilities
- JSON Formatter — Format, minify and validate JSON
- Image Compressor — Compress images locally
- Merge PDF — Combine multiple PDFs
- Data Converter — Convert CSV / JSON / XML
- AI Token Counter & Cost Estimator — Estimate token counts locally and compare API costs across Claude, GPT, Gemini and DeepSeek models
- LLM API Pricing Comparison — Compare input/output/cached prices, context windows and blended cost across Claude, GPT, Gemini and DeepSeek
- QR Code Generator — Turn text or links into a QR code
- Timestamp Converter — Convert between Unix time and dates
- JWT Parser — Decode and parse JWT tokens offline
- Code Formatter — Beautify JS / JSON / CSS / HTML
- Image Converter — Convert PNG / JPG / WebP
- Privacy Policy Generator — Generate an English privacy policy for App Store / Google Play / Stripe with GDPR / CCPA clauses
Browse categories
Developer Tools
- AI Prompt & System Prompt Generator
- Claude Env Scanner & Region Checker
- Claude Proxy Network Checker (Exit IP & Timezone)
- AI Token Counter & Cost Estimator
- LLM API Pricing Comparison
Going-Global Tools
- Privacy Policy Generator
- Test Card Numbers & Luhn Check
- Stripe Fee & Net Calculator
- Multi-Currency & Charm Pricing
- VAT / GST Calculator
Download Tools
Calculators
PDF Tools
Converters
Image Tools
- AI Image Ratio & Resolution Calculator
- Photo Exif & GPS Privacy Cleaner
- QR Code Generator
- WiFi QR Code
- SVG Placeholder
Text Tools
Audio & Video
Lifestyle Tools
Fun & Games
Clear data handling
Most core file tools process input in your browser. Tools that need live data or third-party capabilities explain their network requests on the page.
See the complete tool data directory
Technical references: W3C File API · MDN Web Crypto API · MDN Canvas API
Practical guides
Frequently asked questions
Do PocketKit tools require installation or an account?
No. Open a tool in a modern browser without installing software or creating an account.
Are my files uploaded?
Core PDF, image, text and cryptographic tools generally process files in your browser. Network-dependent features disclose their behavior on the tool page.
How can I find the right tool quickly?
Search for a specific task or browse the task and category sections.
Does PocketKit work on phones and tablets?
Yes. The site supports modern mobile, tablet and desktop browsers, although complex work with large files is usually faster on a desktop browser.
Are PocketKit tools free?
Yes. Core features listed on the home page and in the tool directory are currently free to use, with no subscription or account required. Advertising may support site operations and maintenance, but it does not alter tool results.
Why do some tools need an internet connection?
Features such as exchange rates, DNS lookups and download parsing need current data, so they connect to the PocketKit API or a third-party service identified on the page. Each networked tool explains why it makes requests; core PDF, image and text tools generally process input in the browser.
Are there limits when processing large files?
File-processing capacity mainly depends on device memory, browser limits and file complexity. Large PDFs, images or archives may take longer, so use a desktop browser when possible and keep the page open until processing finishes.
How can I report a problem with a tool?
Send an email through the Contact page. Include the tool URL, device and browser, steps, actual result and expected result, but do not send passwords, API keys or unnecessary private files.