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44 essential tools — QR codes, passwords, image compression, PDF tools, and more. All in one fast, private workspace.
44 tools · 44 showing
Create custom QR codes for URLs, WiFi, contact info, or any text. Choose colors, download as PNG. Works offline — your data never leaves your device.
Generate unguessable passwords with custom length, symbols, and a strength meter that tells you if it's actually secure.
Shrink JPG/PNG/WebP images by up to 90% with no visible quality loss — your photos never leave your device.
Paste messy or broken JSON and instantly see what's wrong. Format, minify, or validate — errors highlighted line by line.
Real-time word, character, sentence, paragraph, and reading-time counter for writers, students, and SEO content.
Generate a hash fingerprint for any text or file — verify integrity or check passwords. SHA-1, SHA-256, SHA-512, MD5.
Generate unique IDs for databases, APIs, and distributed systems. v4 (random) and v7 (time-sortable). Up to 1000 at once.
Merge multiple PDF files into a single document. Drag, drop, reorder, download. No upload, no signup.
Combine multiple images into a single PDF document. Adjust page size, margins, and orientation. No upload, no watermark.
Compress PDF files online for free. Reduce file size up to 90%. No upload, no signup.
Remove the background from any image. Free, no signup. Runs in your browser.
Pick colors visually and convert between HEX, RGB, and HSL. Generate a 5-shade palette from any color with one click. Perfect for designers and developers.
Convert between metric and imperial units — length, weight, temperature, area, volume, speed, and data. 7 categories, instant results.
Three tools in one: live world clock (6 timezones), age calculator (exact years/months/days), and Unix timestamp converter. For devs and schedulers.
Convert text to Base64 or decode Base64 back to readable text. Handles emojis and non-English characters correctly.
Generate placeholder text by words, sentences, or paragraphs — perfect for design mockups, prototypes, and layout testing. No signup.
Test regex patterns with live match highlighting, capture groups, and flags. Built-in cheat sheet. No copy-paste to a terminal required.
Build linear, radial, and conic CSS gradients with live preview. 12 presets included. Copy-paste the CSS into your project in one click.
Write Markdown and see live HTML preview. Supports headings, lists, code, links, images.
Convert text between UPPER, lower, Title Case, camelCase, snake_case, and kebab-case. One click, no signup.
Download any file by URL. Paste a link to download images, videos, music, PDFs, and more. Free, no signup.
Resize, crop, and fit images to exact dimensions. Supports JPG, PNG, WebP. All in your browser.
Convert any text to spoken audio using your browser's built-in voices. Adjust speed and pitch, then download as MP3. No signup, no upload.
Scan QR codes from your webcam or uploaded images. No app install, no permissions stored. Privacy-first — frames never leave your device.
Boost productivity with the Pomodoro Technique. 25-min focus + 5-min breaks. Tracks sessions.
Split PDF into individual pages or custom page ranges. Free, no upload, no watermark.
Convert images between JPG, PNG, WebP, and GIF formats without uploading — your photos stay on your device. Batch-mode supported.
Calculate exact age in years, months, days — or count days between any two dates. Leap-year safe. Useful for visas, eligibility forms, birthdays.
Crop photos online with aspect-ratio presets (1:1, 16:9, 9:16, 4:3). No upload — your photos stay on your device. Free, no signup.
Convert between CSV and JSON formats instantly. Handles nested objects, arrays, and complex data structures. No upload.
Calculate percentages instantly — X% of Y, percentage increase/decrease. No signup, no ads, works offline.
Check your BMI in seconds — no account, no email, no ads. Works with pounds/inches or kg/cm. Result stays on your screen, not on our servers.
Paste a URL with weird characters (%20, %3A, etc.) and decode it to readable text — or encode plain text into a URL-safe format. Useful for debugging links, APIs, and form submissions.
Convert between binary, octal, decimal, and hexadecimal instantly. Built for developers, students, and anyone learning number systems.
Extract text from images, screenshots, and scanned documents. 10+ languages. No upload — your images stay on your device.
Convert PDF to JPG images — each page becomes a separate high-quality image. No upload, no signup, no watermark.
Decode JWT tokens and inspect the header + payload instantly. Check expiry, debug authentication, no token ever leaves your browser.
A full scientific calculator that works offline — trig, logarithms, exponentials, and memory functions. No ads between your calculations.
See your monthly payment, total interest, and full amortization schedule before signing. Adjust rate/term/amount instantly — no signup, no bank script.
Compare two texts side by side and see exactly what changed — line by line, word by word. Ignore case/whitespace options. No upload.
Clean up a list — remove duplicate lines, keep only unique entries. Handles thousands of lines instantly. No upload, no signup.
Sort any list alphabetically, numerically, or by length. Reverse, deduplicate, shuffle. Handles thousands of lines instantly.
Turn any title into a clean, SEO-friendly URL slug. Lowercase, hyphen-separated, special chars stripped. Batch-mode for whole lists.
Shrink HTML, CSS, and JavaScript files for faster page loads. Safe minification — preserves regex, strings, and division operators.
AHX runs entirely in your browser. No accounts, no uploads, no waiting.
Your data stays on your device.
No network round-trip. No spinner.
All 44 tools. No limits.
Yes. All 44 tools are free with no signup and no usage limits.
No. 41 of 42 tools run entirely in your browser. The only exception is the URL downloader, which sends just the URL to fetch the file — we log nothing.
We use the Web Crypto API (crypto.getRandomValues) for cryptographically secure randomness. A 20-character password with all character types has ~131 bits of entropy.
Yes. Once loaded, every tool works without internet. Install AHX as a PWA via "Add to Home Screen" in your browser menu.
Open an issue on our GitHub repository. We respond within 48 hours.