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Instagram DP viewer, YouTube name checker, image converters, crypto & developer utilities. 100% free, private & instant — everything runs in your browser, nothing uploaded.
Whether you need to merge a PDF, view an Instagram profile picture in full size, download a YouTube thumbnail, or generate AI captions — FastTools has you covered. Every tool loads instantly, works on any device, and requires zero signup.
Our calculators handle real formulas — PayPal fees, bill splits, IP subnets. Our converters cover file sizes and image formats like HEIC, PNG, and WebP to JPG. Our PDF tools let you split, merge, and verify documents without uploading anything.
Every tool is fully responsive. Use them on your phone during a commute, on a tablet in a meeting, or on your desktop at work. No app to download — just open your browser and go.
Split & merge PDFs and check digital signatures — all in your browser. No file uploads to external servers.
PayPal fee calculator, bill splitter, anniversary calculator, future age calculator, love calculator, and IP subnet calculator.
Instagram DP viewer with profile picture zoom, YouTube thumbnail downloader, YouTube channel checker, AI QR generator, AI image detector, and a hashtag counter.
JWT decoder, regex tester, JSON to CSV, UUID generator, BIP39 generator, and more converters for developers.
Most online tools upload your files to their servers to process them. FastTools doesn't. Every calculation, conversion, and file operation runs locally in your browser using client-side JavaScript. Your PDFs, images, and text never touch our servers.
We don't ask for your email, don't set tracking cookies, and don't limit how many times you can use a tool. Every tool is free, unlimited, and works the same whether it's your first visit or your thousandth.
No bloated frameworks, no unnecessary third-party scripts. Tools load in under a second and deliver results instantly. Optimized for Core Web Vitals so they work smoothly even on slow mobile connections.
We don't track your inputs or save your files. Your session data vanishes the moment you close the tab.
All traffic is secured with SSL encryption. Your connection to FastTools is always private and secure.
No waiting for server responses. Everything processes locally so you get results in milliseconds, not seconds.
No hidden subscriptions, no "Pro" tiers, and no credit card required. Just free, powerful tools.
Calculators, converters, PDF tools, AI generators, developer utilities & more — browse by category or search above
Practical AI tools for content creation and publishing workflows
Create QR codes for URL, WiFi, contact, and messaging workflows
Generate lyric drafts from theme, genre, mood, and language
Generate platform-focused social captions from a short prompt
Rewrite text in multiple tones for clearer, cleaner content drafts
Create personalized pet name suggestions by traits and style
Estimate OpenAI, Claude, Gemini, and LLM API costs from token usage
Detect AI-written content from ChatGPT, Claude, Gemini using statistical analysis
Detect AI-generated code from Copilot, ChatGPT, Claude across 12+ languages
Deep readability scoring with 7 algorithms including Flesch-Kincaid and SMOG
Optimize content for search engines
open graph meta generator online. open graph tag generator. open graph meta tags, image size. Free.
Analyze keyword density in content for search engine optimization
Generate placeholder text for design mockups and website layouts
Create catchy, SEO-friendly titles that boost engagement and traffic
Security-focused tools for hashing, tokens, 2FA, and key workflows
Generate secure random tokens and API keys with customizable formats
Analyze password entropy, crack time, and common weakness patterns
Generate TOTP codes and setup values for authenticator workflows
Generate and validate BIP39 mnemonic phrases for testing workflows
Hash and verify passwords with configurable bcrypt cost factors
Create keyed signatures for API and webhook verification
Generate UUIDs for records, entities, and distributed-system IDs
Generate sortable unique identifiers for logs, records, and distributed systems
Generate RSA public and private key pairs for development workflows
URL encode decode, percent-encoded strings. Free online web tools.
Browser-based utilities for debugging, parsing, formatting, and data conversion.
Convert HEX, RGB, and HSL color values for frontend implementation.
Convert JSON data to CSV for spreadsheet analysis and reporting workflows.
Convert SQL insert statements into JSON records for migration workflows.
Decode JWT headers and payloads for authentication debugging workflows.
Lookup MIME types and file extensions for uploads and Content-Type validation.
Convert Unix timestamps to readable dates and back across common units.
Test regular expressions with live match feedback and capture-group checks.
Format and beautify HTML with consistent indentation and readable structure.
Convert HTML into Markdown for docs migration and publishing workflows.
Write Markdown and preview rendered output in real time.
Creator-focused tools for social publishing, optimization, and media workflows.
Extract thumbnail images from YouTube video links.
Count and extract hashtags for social caption optimization.
Extract YouTube tag data from video URLs for research workflows.
Check YouTube handle and channel-name availability.
Generate YouTube channel naming ideas by niche and style.
Build a multi-link social bio page for campaign routing.
Estimate creator rates from followers, engagement, platform, and campaign scope.
Calculate TikTok engagement rate from views, likes, comments, shares, and followers.
View and download Instagram profile pictures in full size HD.
View, zoom, and save full-size Instagram profile pictures.
Compress images, remove backgrounds, detect AI images, and extract text with browser-based tools
Remove image backgrounds and export transparent PNG results
Compress JPG, PNG, and WebP images with quality and size controls
Extract editable text from screenshots and document images
Detect AI-generated and deepfake images from Midjourney, DALL-E, Stable Diffusion & more
Split, merge, and verify PDF documents in your browser
Convert file-size units and compare storage values in one place
Calculators for PayPal fees and fair bill splitting
Entertaining tools for celebrations and social content
See how old you'll be on any future date with precision
Countdown to your next birthday in days, hours, and minutes
Calculate how long you've been together with milestones
Focus timer with ambient sounds, tasks, and customizable sessions
Handy calculators for love compatibility, IP subnetting, and conception dates