Developer & Productivity Tools by HaorGrix
An elite developer utility suite — engineered for speed, privacy and the keyboard. — All tools run locally in your browser. No uploads, no account required, no tracking. Works offline.
Format
Format, validate, minify and explore JSON. Handles huge inputs without freezing the tab.
Format MySQL, PostgreSQL, T-SQL and more with configurable indentation.
Render Markdown live with GFM support and copy as clean HTML.
Stamp a text watermark or add page numbers to a PDF, free. Runs in your browser — your file is never uploaded.
Shrink PDF file size while keeping quality. Free online PDF compressor that runs in your browser — your files stay private.
Add text, black-out redaction boxes and highlights to a PDF, free and private — all in your browser.
Convert JPG, PNG and WebP images into a PDF online, free. Runs in your browser — your images are never uploaded.
Free PDF tools that never upload your files. Merge, split, compress, OCR, sign, protect, unlock & repair — all processed privately in your browser.
Combine multiple PDFs into one in seconds. Free, no signup — and your files never leave your browser.
Turn scanned PDFs and images into text or a searchable PDF, free. OCR runs on your device — your files are never uploaded.
Convert each PDF page to a high-resolution JPG or PNG image, free. Runs in your browser — your file is never uploaded.
Extract clean, plain text from a PDF online for free. Runs in your browser — your document is never uploaded.
Encrypt a PDF with a password using 256-bit AES, free. Runs in your browser with qpdf — your file is never uploaded.
Black out every occurrence of a word or phrase in a PDF, free. Runs in your browser — your file is never uploaded.
Strip stamp and text watermark overlays from a PDF, free. Runs in your browser — your file is never uploaded.
Recover and rebuild a corrupt or damaged PDF, free. Runs in your browser with qpdf — your file is never uploaded.
Rotate PDF pages 90°, 180° or 270° and save, free. Runs in your browser — your file is never uploaded.
Add a signature image to a PDF, free. Runs in your browser — your document and signature are never uploaded.
Split a PDF or extract specific page ranges instantly. Free and private — processed in your browser, never uploaded.
Remove a password and owner restrictions from a PDF, free. Runs in your browser with qpdf — your file is never uploaded.
Encode
Convert
Round-trip data between YAML, JSON, XML and CSV with structure-preserving conversion.
Cut out subjects and erase backgrounds with U²-Net AI segmentation — transparent, solid, or blurred, 100% in-browser.
Reduce image file size with optimal quality preservation directly in browser.
Crop photos with an interactive selection, aspect-ratio presets, and exact pixel inputs — format preserved, 100% in-browser.
Universally convert between PNG, JPG, WebP, and other formats locally.
Convert Apple HEIC photos to standard high-quality JPEG images instantly.
Combine multiple images into one PDF with custom page size, orientation, and margins — reorderable, 100% in-browser.
Upscale and enhance images 2× with AI — sharper, larger photos, 100% in your browser.
Free, private, in-browser image tools. Convert HEIC, compress, resize, change formats, make passport photos, and remove backgrounds & watermarks — all processed locally, zero uploads.
Resize and crop passport photos to exact biometric dimensions for 54+ countries at 300 DPI.
Resize and crop photos by pixel dimensions or aspect ratios.
Rotate images 90°, 180°, or 270° and flip horizontally or vertically — batch-ready, format preserved, 100% in-browser.
Paint over logos or text overlays and remove them with LaMa AI inpainting — quality preserved, 100% in-browser.
Generate
Generate UUID v4 / v7, and hash text with SHA-1, SHA-256, SHA-384, SHA-512.
Compose cron expressions visually and see the next 10 fire times.
Write Mermaid syntax and preview flowcharts, sequence, class, state and ER diagrams live — then export the SVG.
Use our free, 100% client-side Age Calculator. Calculate your exact age in years, months, days, hours and minutes. Enter your birth date and get an accurate breakdown instantly. No login or signup required. Your data never leaves your browser.
Use our free, 100% client-side Baby Sleep & Nap Scheduler. Generate an age-appropriate daily sleep schedule for your baby using recommended wake windows and nap counts. Omit sleep stress. No login or signup required. Your data never leaves your browser.
Convert between text, files and Base64. Supports URL-safe variant and binary input.
US Navy circumference method with lean-mass breakdown. Estimate your body fat percentage using the US Navy circumference method from neck, waist (and hip for
Use our free, 100% client-side Business Card Maker. Design premium, print-ready business cards from a single form. Export high-resolution, bleeding-safe PDFs instantly. 100% free. No login or signup required. Your data never leaves your browser.
Free business & finance tools by HaorGrix — invoice, quotation, receipt, payslip and purchase-order generators, business cards, certificates. In your browser, no signup.
Use our free, 100% client-side Calendar Date Calculator. Calculate the exact days between two dates, add or subtract days, and compute business days. Fast, secure, offline-ready calendar tool. No login or signup required. Your data never leaves your browser.
BMR/TDEE via Mifflin-St Jeor & Harris-Benedict, plus macros. Estimate your daily calorie needs (TDEE) using both the Mifflin-St Jeor and Harris-Benedict equat
Use our free, 100% client-side Certificate Generator. Bulk-generate beautiful PDF certificates using a CSV list. Fully private, browser-side event certificate creator. No login or signup required. Your data never leaves your browser.
Use our free, 100% client-side Child Growth Percentile Tracker. Calculate height, weight, and head circumference percentiles against WHO growth standards (0–5 years). Plot growth curves securely. No login or signup required. Your data never leaves your browser.
Compose cron expressions visually and see the next 10 fire times.
Line and character-level diff with whitespace and case toggles.
Use our free, 100% client-side Pregnancy Due Date Calculator. Calculate your estimated baby due date using LMP, conception date, or IVF transfer info. Includes a week-by-week development log. No login or signup required. Your data never leaves your browser.
Free fitness & wellness calculators by HaorGrix — BMI (Western & WHO Asian), body fat %, calorie & macros, heart-rate zones and sleep cycles. Private, in your browser, no signup.
Round-trip data between YAML, JSON, XML and CSV with structure-preserving conversion.
Use our free, 100% client-side Ideal Body Weight Calculator. Calculate your ideal body weight using Devine, Robinson, and Miller formulas side-by-side. Supports metric and imperial systems. No login or signup required. Your data never leaves your browser.
Use our free, 100% client-side Invoice Generator. Create and download professional PDF invoices instantly. Free, client-side invoice creator with customizable branding and currencies. No login or signup required. Your data never leaves your browser.
Format, validate, minify and explore JSON. Handles huge inputs without freezing the tab.
Decode JWT header, payload and signature into syntax-highlighted, navigable JSON.
Render Markdown live with GFM support and copy as clean HTML.
Use our free, 100% client-side Menstrual Cycle Predictor. Track and analyze your menstrual cycle history to predict upcoming cycles and flag cycle length variations client-side. No login or signup required. Your data never leaves your browser.
Write Mermaid syntax and preview flowcharts, sequence, class, state and ER diagrams live — then export the SVG.
BMI mapped against both Western and WHO Asian thresholds. Compute your Body Mass Index and see it mapped side-by-side against standard WHO/Western thresholds
Use our free, 100% client-side Payslip Generator. Generate employee salary slips with earnings and deductions. Free, client-side payslip creator. No login or signup required. Your data never leaves your browser.
Use our free, 100% client-side Pediatric Medication Dosage Calculator. Calculate safe weight-based liquid paracetamol and ibuprofen dosages for children. Includes concentration conversions and safety checks. No login or signup required. Your data never leaves your browser.
Use our free, 100% client-side Period & Ovulation Calculator. Predict your next period, peak ovulation day, and fertile windows. Free, secure, client-side menstrual cycle calendar tracker. No login or signup required. Your data never leaves your browser.
Use our free, 100% client-side Pregnancy Weight Gain Tracker. Track your weight gain through pregnancy weeks against IOM guidelines customized for your pre-pregnancy BMI. Fully secure log. No login or signup required. Your data never leaves your browser.
Use our free, 100% client-side Purchase Order Generator. Create formal POs for vendors with item details and terms. Free, client-side PO creator. No login or signup required. Your data never leaves your browser.
Use our free, 100% client-side Quotation Generator. Send estimated price quotes to clients before the job begins. Free, client-side quote creator. No login or signup required. Your data never leaves your browser.
Use our free, 100% client-side Receipt Generator. Issue official payment receipts to confirm transactions. Free, client-side receipt creator. No login or signup required. Your data never leaves your browser.
Interactive regular expression matcher with live highlights, capture groups and flag toggles.
Wake-up and bedtime windows aligned to 90-minute cycles. Find the best times to wake up or fall asleep based on 90-minute sleep cycles plus a 15-minute fall-a
Format MySQL, PostgreSQL, T-SQL and more with configurable indentation.
Use our free, 100% client-side Symptom Red-Flag Checker. A private, non-diagnostic checklist to identify warning signs in symptoms and evaluate care urgency (ER, Clinic, or Self-Care). No login or signup required. Your data never leaves your browser.
Karvonen zones from warm-up to VO₂ max. Calculate your five training heart-rate zones — warm-up, fat burn, aerobic, anaerobic and VO₂ max — using the Karvonen
Create a free availability poll for a group across time zones. Members pick when they’re free; see the best overlapping slot. No accounts.
See exactly when a deadline hits in your local time, including Anywhere-on-Earth (AoE). Free, in-browser, with a live countdown.
Convert any time between any time zones in the world — DST-accurate, free, and private (runs in your browser).
Find a meeting time that works across multiple time zones. Free in-browser overlap grid showing everyone’s local hours.
A live world clock showing the current time in any cities and time zones you pin — DST-accurate, free, and private (runs in your browser).
Encode and decode URLs and URL components with full Unicode support.
Generate UUID v4 / v7, and hash text with SHA-1, SHA-256, SHA-384, SHA-512.
Use our free, 100% client-side Vaccine Schedule Advisor. Generate a personalized childhood vaccination schedule from birth dates. Choose between WHO guidelines and national schedules. No login or signup required. Your data never leaves your browser.
Use our free, 100% client-side Water Intake Tracker. Calculate your daily hydration requirements based on weight and activity, and log your water glasses client-side. Reset daily automatically. No login or signup required. Your data never leaves your browser.
Inspect
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