68 Free Online Tools — PDF, Image, Developer & Everyday Utilities
Kova Core is a free suite of browser-based tools: organize, merge, split and compress PDFs, compress and convert images, format JSON, XML and SQL, generate passwords, hashes and QR codes, and more.
Document & PDF Utilities
- PDF Organizer Pro — Merge, split, reorder, and insert pages visually.
- Image to Text (OCR) — Copy text from photos, screenshots and scanned PDFs.
- Sign PDF — Draw or type your signature and place it on a PDF.
- PDF Merger — Combine multiple PDF files into a single document.
- PDF Splitter — Split a PDF into separate pages or ranges.
- PDF Compressor — Reduce PDF file size while preserving quality.
- PDF Watermark & Stamp — Add visual checkprint chops and watermarks.
Privacy & Safety
- ID Copy Protector — Black out details and watermark your IC or passport copy.
- QR Code Safety Checker — See where a QR code really leads before you open it.
- Photo Location Remover — See and remove the hidden GPS location in your photos.
Image & Graphic Utilities
- Image Compressor — Shrink JPG, PNG, WebP up to 90% without quality loss.
- Pro Image Editor — Crop, resize, and preview images visually.
- Color Picker — Pick colors from uploaded images interactively.
- HEIC to JPG — Convert iPhone HEIC photos to standard JPG/PNG.
- WebP Converter — Convert WebP to JPG or PNG easily.
- SVG Converter — Convert SVG vectors to high-res PNG/JPG.
- CSS Gradient — Generate linear CSS gradients.
Essential Power Tools
- ZIP Compressor — Compress multiple large files into a ZIP securely.
- Epoch Converter — Convert Unix timestamps to human dates.
- Text ⇌ ASCII — Convert letters into ASCII decimal numbers.
- Box Shadow Generator — Visually create beautiful CSS box shadows.
- HTML Entity Encoder — Safely escape HTML entities and tags.
- JSON Minifier — Minify and compress JSON structures.
- String Generator — Generate secure random tokens and strings.
Developer Utilities
- JSON Formatter — Beautify, validate, and minify JSON code.
- Base64 Encoder — Encode or decode strings to Base64.
- Hash Generator — Generate secure MD5, SHA-1, SHA-256 hashes.
- URL Encoder — Encode or decode URL strings safely.
- QR Generator — Generate and download custom QR codes.
- JSON ⇌ CSV — Convert arrays of JSON objects to CSV.
- Password Generator — Create secure random passwords.
- Text ⇌ Binary — Convert standard text into binary code.
Formatting & Conversion
- XML Formatter — Format, beautify, and minify XML.
- SQL Formatter — Beautify messy SQL queries for multiple dialects.
- Web Code Beautifier — Instantly format HTML, CSS, and JS.
- CSV to JSON — Convert CSV datasets into JSON arrays.
- XML ⇌ JSON — Convert structures between XML and JSON.
- URL Parser — Extract domains and query params from URLs.
Math & Finance
- Currency Converter — Live exchange rates for global currencies.
- Loan Calculator — Calculate mortgage and loan payments.
- Percentage Calculator — Instantly solve percentage math problems.
- Discount & Tax — Calculate final prices after discounts and sales tax.
- Split Bill Calculator — Split a bill equally or by items, with service charge and GST.
- Salary Converter — Convert wage between hourly, monthly, and yearly equivalents.
Network & Security
- JWT Decoder — Decode JSON Web Tokens securely.
- Bcrypt Generator — Hash passwords and verify Bcrypt matches.
- User-Agent Parser — Extract OS and browser from UA strings.
- UUID Generator — Generate completely random UUIDs.
- MAC Address Generator — Create random MAC addresses for testing.
Web Utilities
- IP Locator — Find geographic details of an IP or domain.
- HTTP Status Codes — Quick dictionary for HTTP status codes.
- Regex Tester — Test regular expressions directly in the browser.
- JS Keycode Info — Get Javascript event keycodes instantly.
Miscellaneous
- Pomodoro Timer — Boost your productivity with timed focus sessions.
- JSON Validator — Strictly validate JSON to find syntax errors.
- Text to Speech — Convert text into realistic browser speech.
- Speech to Text — Dictate sentences using your microphone.
- BMI Calculator — Calculate your Body Mass Index (Metric & Imperial).
Everyday Tools
- Stopwatch & Timer — A beautiful stopwatch and countdown timer.
- Basic Calculator — A simple, clean calculator for daily use.
- Random Generator — Roll dice, flip coins, or get random numbers.
- Unit Converter — Convert length, weight, temperature, area, volume, speed, time, and data storage.
Text & Writing Utilities
- Case Converter — Convert text to UPPERCASE, lowercase, and more.
- Lorem Ipsum — Generate random placeholder text easily.
- Word Counter — Count words, characters, and reading time.
- Text Diff Checker — Compare two pieces of text and find differences.
- Slug Generator — Create SEO-friendly URL slugs from titles.
- Markdown ⇌ HTML — Convert Markdown to HTML and vice-versa.
Guides
- The Generations of AI Explained: How Smart Is AI in 2026?
- How to Use ChatGPT, Claude and Gemini: A Beginner's Guide
- ComfyUI for Beginners: Make Your First AI Image, Step by Step
- How to Run AI on Your Own Computer (Free and Private)
- How to Spot AI Scams and Deepfakes: A Singapore Guide
- Trust Bank Referral Code DKNSEX44: 2026 Sign-Up Guide
- Why Every Developer Needs a Local JSON Formatter in 2026
- How to Merge, Split, and Compress PDF Files for Free (No Software, No Uploads)
- 12 Free Online Developer Tools Worth Bookmarking in 2026