Tool Directory ✨
A curated set of efficient online tools, organized by category
PocketKit online utilities catalog
No matching tools found
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
Word Counter
Count characters, words, lines
Currency Converter
Convert 30+ currencies at live mid-market rates with edge caching and offline fallback — for global pricing and expenses
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
Image Converter
Convert PNG / JPG / WebP
AI Prompt & System Prompt Generator
Structure and optimize system prompts for DeepSeek, Claude, and ChatGPT with code review, translation and content templates
AI Image Ratio & Resolution Calculator
Calculate exact pixel resolution, aspect ratios and --ar parameters for Midjourney, Flux.1, and SDXL image generators
Photo Exif & GPS Privacy Cleaner
100% in-browser removal of photo GPS locations, device models, exposure and Exif privacy metadata
Claude Env Scanner & Region Checker
Check browser timezone, system locale, language, and font fingerprints to detect Claude region blocking or account ban risks, helping you secure proxy configurations.
TikTok Video Downloader
Parse public TikTok links and save available MP4 video or extract its audio. Resolution and watermark status depend on the source media stream.
Suno AI Music Downloader
Parse public Suno AI music links and retrieve available audio, artwork and lyrics. Formats and quality depend on the public source item.
TikTok MP3 Sound Downloader
Extract complete audio tracks and BGMs from public TikTok videos, preview them online and save MP3 when available. Bitrate depends on the source audio.
Suno AI Video Downloader
Parse public Suno links and save available MP4 music videos. Resolution, captions and availability depend on the source item.
Claude Proxy Network Checker
Detect your real exit IP and region, cross-check it against system timezone, language and WebRTC leaks to find proxy exposure points and reduce Claude ban risk
Tool & Function Schema Converter
Convert between Claude tool, OpenAI function, Gemini functionDeclaration and JSON Schema — with strict mode
Multimodal Vision Token Counter
Calculate image tile vision tokens and API cost for GPT-4o, Claude 3.5 Sonnet and Gemini 1.5
System Prompt Anti-Leak & Jailbreak Auditor
Audit system prompt robustness against 20+ LLM injection patterns and auto-patch structural directives
Cron Generator
Generate and parse Cron expressions with execution schedule preview
Keycode Info
Get keyboard event key, code, and keycode details
User Agent Parser
Parse User Agent strings to identify browser, OS, and device
Bcrypt Generator
Generate and verify Bcrypt password hashes
HMAC Generator
Compute HMAC signatures (SHA256/512) for messages
IPv4 Subnet Calculator
Compute subnet mask, network range, usable IPs and binary format
Docker Compose Converter
Convert docker run commands to docker-compose.yml format
Chmod Calculator
Calculate Linux file/directory permission values and command
BIP39 Generator
Generate and verify multi-language BIP39 mnemonic phrases
ULID Generator
Generate lexicographically sortable unique identifiers
URL Parser
Parse URL structures and edit query parameters interactively
URL Encode/Decode
Encode / decode URL components
Base Converter
Convert between 2/8/10/16
ASCII Table
Look up ASCII 0-127
HTTP Status Codes
Common status codes reference
Password Generator
Generate secure random passwords
Docker Command
Build a docker run command
Windows Commands
Generate common Windows commands
Linux Commands
Generate common Linux commands
Base64 Encode/Decode
Convert text to/from Base64
Unit Converter
Convert length, weight, temperature…
WiFi QR Code
Generate a QR code to connect to your WiFi network
SVG Placeholder
Generate and download custom SVG placeholder images
Color Converter
Convert between HEX / RGB / HSL
AI Background Remover
One-click AI cutout in your browser — no upload
ID Photo Maker
Auto cutout, bg swap & standard ID sizes
Screenshot Beautifier
Add gradient background, rounded corners & shadow
Signature Pad
Draw a signature, export PNG
Screen Color Picker
Sample any color on screen
Grid Splitter
Split an image into tiles, zip them
Images to PDF
Combine images into one PDF
ZIP Extractor
Unzip locally and download files
HTML ⇄ Markdown
Convert between HTML and Markdown
Case Converter
Convert strings between camelCase, snake_case, kebab-case etc.
List Converter
Convert simple lists into JSON arrays, SQL IN lists, or CSVs
HTML Entities
Encode and decode HTML entity character representations safely
Stealth Reader
Blog-disguised TXT novel reader
Text to Speech
Read text aloud
BMI Calculator
Calculate body mass index
Stopwatch
Timing with laps
Day Counter
Days to / since a date
Loan Calculator
Monthly payment, total interest and full amortization
Percentage Calculator
X% of Y, ratios and percent change
Discount Calculator
Sale price and savings, with stacked discounts and tax
Tip Calculator
Tip and total by rate, split across people
Sales Tax Calculator
US state sales tax, with tax-inclusive reverse mode
Compound Interest Calculator
Compound growth with optional monthly contributions
GPA Calculator
Calculate overall and semester GPA with course grades, credits and various grading scales (4.0, 4.3, 5.0, WES).
BMR & TDEE Calculator
Compute Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE) with Mifflin-St Jeor & Harris-Benedict formulas.
Mortgage Refinance Calculator
Compare your current mortgage with refinance options to find monthly savings, total interest saved, and the break-even period.
Reaction Test
Test your reaction time
What to Eat
Decide what to eat
Text Diff
Highlight line-by-line differences
Regex Tester
Test regex matches and groups live
UUID Generator
Generate UUID v4 in bulk
Byte Calculator
Convert B / KB / MB / GB
Punycode
IDN domain ⇄ Punycode
Hash
MD5 / SHA-1 / SHA-256…
AES Encrypt
AES-256-GCM with password
RSA
Generate keypair, encrypt/decrypt
MIME Types
Extension ⇄ MIME lookup
Special Symbols
Symbol library, click to copy
Emoji Picker
Emoji by category, click to copy
ASCII Art
Turn text into ASCII banners
Image to Base64
Image to DataURL / CSS
Favicon Maker
Export PNG icons of each size
ID Card Check
Validate & parse ID numbers
Online Piano
Play with keyboard or mouse
Filler Text
Topic → long filler text
Payment Voice
Speak a payment-received line
Shape Recall Game
Recreate random geometric shapes from memory by dragging, scaling, and rotating
Time Memory Game
Test your time perception by holding down a button to match system pulse durations
Sound Memory Game
Test your pitch memory by matching sound wave frequencies with a tone slider
Chinese Convert
Simplified ⇄ Traditional Chinese
Code Formatter
Beautify JS / JSON / CSS / HTML
UCharts Builder
Create beautiful interactive charts from raw data grids locally
Split PDF
Split PDF by page or range
Organize PDF
Delete / rotate / reorder pages
PDF to Image
Export each page as PNG
PDF Password
Add or remove PDF password
Image Crop
Drag to crop an image
Image Effects
Grayscale / flip / border / pixelate
EXIF Viewer
View & strip image metadata
Image to Pixel Art
Convert images locally into retro 8-bit pixel art styles
Art Avatar Generator
Customize and generate beautiful vector avatars with SVG/PNG exports
CSS Gradient Generator
Visually tune angle and color stops to preview and generate linear/radial gradient CSS
CSS Box-Shadow Generator
Visually build multi-layer box-shadow and inset shadows with live preview and copyable CSS
Glassmorphism Generator
Generate frosted-glass (glassmorphism) effects with backdrop-filter — tune blur/opacity/border and copy CSS
Contrast Checker
Check foreground/background contrast against WCAG accessibility levels (AA/AAA) with a live readability preview
SQL Formatter
Beautify SQL by breaking and indenting at major clauses and normalizing keyword case
JSON to Types
Infer TypeScript interfaces, Go structs or Python TypedDict from JSON, with nested types and array merging
GPT Token Counter
Count GPT-4o/4/3.5 tokens exactly with OpenAI's official BPE (o200k/cl100k) locally and estimate cost
cURL to Code
Convert a curl command into JS fetch / axios / Python requests / Go code, detecting method, headers and JSON body
Markdown Table Generator
Edit tables visually and generate Markdown table code, with per-column alignment, add/remove rows and columns
Lorem Ipsum Generator
Generate classic Lorem Ipsum placeholder text by paragraphs, sentences or words for layout mockups
Text Line Tools
Dedupe, sort, drop blanks, trim and reverse text by line — batch-clean text with live toggles
Privacy Policy Generator
Generate an English privacy policy for App Store / Google Play / Stripe with GDPR / CCPA clauses
Test Card Numbers & Luhn Check
Validate card numbers (Luhn) and brand, generate valid test numbers, and list common gateway test cards
Stripe Fee & Net Calculator
Compute Stripe fees and net payout, reverse-solve the charge for a target net, plus international / FX surcharges
Multi-Currency & Charm Pricing
Convert one base price to many currencies with .99 / round charm pricing for global pricing pages; editable rates, offline
VAT / GST Calculator
Look up VAT/GST standard rates by country and convert net ⇄ gross for cross-border invoicing
Stripe vs Lemon Squeezy vs Paddle Comparison
Compare net payout, MoR global tax filing and processing fees between Stripe, Lemon Squeezy and Paddle
Purchasing Power Parity Pricing Calculator
Calculate localized PPP discount pricing for 40+ countries based on World Bank indices and export JSON
DNS Lookup
Query A / AAAA / MX / TXT / NS / CNAME / CAA records via Cloudflare DNS-over-HTTPS, right in your browser
Email Deliverability Check
Check a domain's SPF, DKIM and DMARC records with fix-it advice to improve inbox placement for outbound mail
Deploy Config Generator
Generate _headers / _redirects (Cloudflare Pages / Netlify) and vercel.json — SPA fallback, security headers, caching, redirects
CORS Config Generator
Configure CORS headers visually and generate Express / Nginx / Cloudflare Worker snippets, with credentials/wildcard warnings
robots.txt Generator
Build robots.txt from per-user-agent groups with Allow/Disallow, Crawl-delay, Sitemap and one-click AI-crawler blocking
i18n JSON Checker
Diff two locale JSON files for missing/extra keys and placeholder mismatches — essential for frontend i18n
hreflang Tag Generator
Generate hreflang and x-default tags for multilingual sites (subdir / subdomain / query strategies) to avoid duplicate content
Timezone Meeting Planner
From your local time, see the same moment across US/EU/Asia zones with day-offset — for scheduling meetings and launches
UTM Link Builder
Build UTM-tagged tracking URLs with consistent source/medium/campaign naming for ads, email and social attribution
Open Graph Meta Generator
Generate Open Graph and Twitter Card meta tags with a live social-card preview for rich link previews on Facebook, X and chat apps
Tools Directory FAQ
Which tools avoid file uploads?
Most PDF, image, text and cryptographic tools process core input in the browser; networked features are identified on each tool page.
How do I find a utility quickly?
Use search, popular tags or the crawlable category links to find a specific task.