kittokit
Tools That Stay in Your Browser.
Background removal, format conversion, unit conversions. All processing happens on your device — no uploads, no account, no tracking.
All Tools
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AI Image Detector — Is It AI-Generated?
Upload any image and find out if it was created by AI. The ML classifier runs in your browser — your image is never uploaded to a server.
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AI Text Detector — ChatGPT & LLM Checker
Paste text and find out if an AI wrote it. The classifier runs locally in your browser — useful for teachers, editors, and journalists.
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Amortization Calculator — Loan Payment Schedule
Enter your loan amount, interest rate, and term. Get your monthly payment and a complete period-by-period breakdown of principal and interest.
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Audio Transcription — Speech to Text
Turn spoken words into editable text — entirely in your browser, no server uploads, no account required.
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Base64 Encoder and Decoder Online
Encode or decode Base64 instantly in your browser. No data leaves your device. Perfect for API payloads, email attachments, and dev debugging.
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Car Lease Payment Calculator — Money Factor
Enter the vehicle MSRP, residual value, money factor, and any cap cost reductions — get your exact monthly lease payment before stepping into a dealership.
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Cash Discount Calculator — Early Payment
Enter invoice amount, discount rate, and payment window to compute savings — plus the annualized cost of skipping the discount, so you know what delaying payment really costs.
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Cash Flow Calculator for Business
Enter your income and expenses across operating, investing, and financing activities to calculate net cash flow and see where your money is really going.
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Celsius to Fahrenheit Converter
Type a temperature in Celsius or Fahrenheit and get the instant conversion. Works both ways — plus a full reference table for cooking, weather, and body temperature.
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Centimeters to Inches Converter — Exact & Fast
Convert centimeters to inches (and back) with exact precision. Covers TV screen diagonals, clothing sizes, furniture dimensions, and height measurements.
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Character Counter — Live Count for Any Text
Paste or type text and instantly see character count, word count, sentence count, and paragraph count. Includes platform-specific limits for Twitter/X, LinkedIn, SMS, and meta descriptions.
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Compound Interest Calculator — 401(k) & Savings
Enter principal, interest rate, time, and compounding frequency to see exactly how your money grows. Covers savings accounts, 401(k) and IRA projections, and CDs. Includes the Rule of 72 shortcut.
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Convert HEIC to JPG — Free, Local, No Upload
Convert iPhone HEIC photos to JPG instantly — batch folders, no upload, 100% private
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Convert HEIC to PNG — Lossless, Local, No Upload
Convert iPhone HEIC photos to lossless PNG — batch folders, no upload, 100% private
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CSS Formatter, Beautifier & Minifier
Paste raw or minified CSS and get it back clean and indented — or switch to minify mode to strip whitespace for production. No server, no signup.
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Discount Calculator — Price & Savings
Enter an original price and a discount percentage to get the sale price and dollar savings — or work backwards from a sale price to find the percentage off.
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Estate & Inheritance Tax Calculator
Enter an estate value and see the estimated federal estate tax and applicable state estate or inheritance tax. Covers all 50 states. Runs privately in your browser.
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Feet to Meters Converter — ft to m
Type feet, get meters. Type meters, get feet. Exact, instant, no-fuss.
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Grams to Ounces Converter — g to oz
Type grams, get ounces. Type ounces, get grams. Instant, exact, bidirectional.
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Hash Generator — MD5, SHA-256, SHA-512
Paste text, pick an algorithm, copy your hash. All computation stays in your browser — nothing leaves your machine.
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Hectares to Acres Converter — ha to ac
Type hectares, get acres. Type acres, get hectares. Exact conversion, instant result.
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HEVC to H.264 Converter — H.265 to MP4
Drop your iPhone or Apple video, get a universally compatible H.264 MP4. All conversion runs in your browser — your file never touches a server.
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Hex to RGB Color Converter — #RRGGBB
Paste a hex code, get RGB and HSL instantly. Or enter RGB values to get the hex. Live color preview included.
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Hourly Wage to Annual Salary Calculator
Enter your hourly rate and work schedule — get your annual salary, monthly pay, and weekly gross in one click. No sign-up required.
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Image Diff — Visual Comparison Tool
Upload two images and instantly see every pixel that changed. Side-by-side view plus a highlighted diff overlay — all processed locally in your browser.
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Image to Text — OCR Converter Online
Drop an image and get editable text in seconds. Optical character recognition runs entirely on your device — your images never leave the browser.
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Inches to Centimeters Converter — Exact & Fast
Convert inches to centimeters (and back) with exact precision. Built for US clothing sizes, screen dimensions, body measurements, and international shopping comparisons.
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Interest Calculator — Simple, Compound, US APR & UK ISA
Run the math both ways: simple I = P × r × t, or compound at any frequency. Apply your US federal marginal bracket or your UK income-tax band on the interest, or set 0% for an ISA / Roth account.
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JPG to PDF Converter — Merge Images to PDF
Drop your JPG or PNG photos, arrange them, and download a single PDF. Everything runs in your browser — no upload, no account required.
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JSON Diff — Compare Two JSON Documents
Paste two JSON documents, see exactly what changed — added keys in green, removed in red, changed values highlighted. Runs entirely in your browser.
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JSON Formatter & Validator Online
Paste minified JSON and get clean, readable output instantly. Validates syntax and highlights errors — zero server calls.
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JSON to CSV Converter — Free Online
Turn any JSON array into a clean CSV file in seconds. Nested objects are flattened automatically — no scripting needed.
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JWT Decoder — Decode JSON Web Tokens
Decode any JSON Web Token in the browser. See the header, payload, and signature in a readable format — and check expiry at a glance.
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Kilograms to Pounds Converter — kg to lbs
Type a weight in kilograms and get the pounds equivalent instantly. Includes a quick-reference table for common body weights and luggage limits.
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Kilometers to Miles Converter — km to mi
Type a distance in kilometers and get the miles equivalent instantly. Covers road speeds, running races, and travel distances with a handy reference table.
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Liters to Gallons Converter — US & Imperial
Enter any value in liters or US gallons and get an instant, precise conversion. Includes a quick-reference table for common volumes and both US and Imperial gallon definitions.
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Loan Payment Calculator — Monthly & Total Cost
Enter loan amount, interest rate, and term — get your monthly payment, total interest paid, and complete cost breakdown in seconds.
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Lorem Ipsum Generator — Paragraphs, Words, Sentences
Choose how many paragraphs, sentences, or words you need — copy clean lorem ipsum placeholder text in one click. No ads, no sign-up, no tracking.
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Meters to Feet Converter — m to ft and Back
Type meters to get feet, or feet to get meters — both directions, instant, precise. Includes a conversion table and practical reference points for US everyday use.
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Metric Tons to Pounds Converter (t to lbs)
1 metric ton = 2,204.62 lbs. Enter any value in tonnes or pounds for an instant conversion — with a clear explainer on metric vs. short vs. long tons.
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Milliliters to Fluid Ounces Converter — mL to fl oz
Enter milliliters to get US fluid ounces — or fluid ounces to get milliliters. Covers beverages, recipe conversion, medicine dosing, and cosmetics bottle sizes with a quick-reference table.
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Millimeters to Inches Converter — mm to in and Back
Enter millimeters to get inches, or inches to get millimeters — both directions, exact. Includes a reference table for screen diagonals, tire widths, screw sizes, and drill bits.
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Moon Phase Calculator — Find the Moon Phase for Any Date
Pick a date — instantly see the moon phase, illumination, and upcoming lunar events.
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Nautical Miles to Kilometers Converter
Enter nautical miles to get kilometers, or kilometers to get nautical miles — exact conversion based on the international definition of 1 nmi = 1.852 km.
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P/E Ratio Calculator — Price-to-Earnings
Enter a stock price and EPS — get the P/E ratio instantly. Supports trailing and forward P/E with context for S&P 500 benchmarks.
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Paycheck Calculator — US Federal & UK Take-Home
Enter your gross annual salary, pick your filing status (US) or just your salary (UK), and see federal/income tax, FICA or NI, and your take-home pay broken down by line.
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PDF Compressor — Shrink PDF File Size Free
Shrink oversized PDFs for email attachments, web uploads, and cloud storage — processed locally in your browser, never on a server.
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PDF Merger — Combine PDF Files Into One
Add as many PDFs as you need, drag them into the right order, and merge them into a single document — all locally in your browser.
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PDF Password Remover — Unlock Your PDF Free
Provide the correct password and get back a clean, unlocked PDF — processed entirely in your browser, never uploaded anywhere.
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PDF Splitter — Extract or Split Pages Free
Extract a single page, split by range, or burst every page into separate files — all processed locally, never uploaded.
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PDF to JPG Converter — Export Pages as Images
Render each PDF page as a sharp JPEG — pick your DPI and quality, download individually or as a ZIP, all processed locally.
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Pounds to Kilograms Converter — lbs to kg
Type any weight in pounds and get the exact kilogram equivalent instantly — useful for gym tracking, shipping, and international travel.
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QR Code Generator — Free, No Signup Required
Create a scannable QR code in seconds — paste a URL, type text, enter WiFi details, or fill in a contact card, then download as PNG or SVG.
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Regex Tester — Live Pattern Matching
Paste your pattern and test string, see matches highlighted in real time — supports flags g, i, m, s and shows capture groups with index offsets.
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Remove Image Background — AI, No Upload
Drop any photo — the AI removes the background in seconds. Your image stays on your device. No account, no upload, no watermark.
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ROI Calculator — Return on Investment
Enter your investment cost and net profit — get ROI percentage, annualized return, and a clear breakdown of what each dollar earned.
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Roman Numeral Converter — 1 to 3999
Type a number (1–3999) to get the Roman numeral, or enter Roman numerals to get the integer back — with a full breakdown of every symbol used.
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Sales Tax & VAT Calculator — US States and UK VAT
Pick your US state for the right state-level sales-tax rate, or switch to UK for the four official VAT bands. Add tax to a net price or extract tax from a tax-inclusive total.
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Secure Password Generator — Configurable & Private
Set your length and character rules — uppercase, lowercase, numbers, symbols — and get a cryptographically random password instantly. Nothing leaves your browser. Ever.
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Speech Enhancer — Noise Reduction Online
Upload a voice recording, apply noise reduction and clarity enhancement, and download the cleaned audio — all processed locally in your browser with no server upload.
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SQL Formatter & Beautifier — Free Online
Paste any SQL query — minified, messy, or single-line — and get properly indented, keyword-capitalized output with consistent clause alignment in seconds.
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Square Kilometers to Square Miles Converter
Enter any area in square kilometers and get the square mile equivalent instantly — with a US state and national park reference table.
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Square Meters to Square Feet Converter — m² to ft²
Enter any area in square meters and get the square foot equivalent immediately — with a US apartment and room size reference table.
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Stone to Kilograms Converter — st to kg
Enter a weight in stone to get kilograms and pounds — or enter kilograms to get the stone and pounds breakdown used in the UK and Ireland.
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Text Diff Tool — Compare Two Texts Online
Compare any two texts side-by-side or in unified view. Additions in green, deletions in red — instantly, without uploading anything.
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Time Zone Converter — US & World Time Zones
Convert a time between any two time zones in seconds. Covers all US time zones plus hundreds of cities worldwide. Automatically accounts for Daylight Saving Time.
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Unix Timestamp Converter — Epoch to Date
Paste a Unix timestamp and get a human-readable date. Or pick a date and get the epoch value. Handles both seconds and milliseconds automatically.
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URL Encoder & Decoder — Percent-Encode Online
Paste any text or URL — encode it for safe use in query strings, or decode a percent-encoded URL back to readable form. Covers encodeURIComponent and encodeURI modes.
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UUID Generator — Random UUIDs v4 Online
Click once for a fresh UUID v4, or generate up to 1,000 at a time. Copy individually or export the full list. Cryptographically random, browser-based, private.
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Video Background Remover — Browser-Based ML Tool
Drop a video, remove the background with one click. Replace it with a solid color, an image, or blur it out. ML runs locally via WebAssembly — your file never leaves your device.
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WCAG Contrast Checker — AA & AAA Tester
Enter a foreground and background color and see the WCAG 2.1 contrast ratio with instant AA and AAA pass/fail — essential for accessible web design.
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Webcam Background Blur — Live Video Call Tool
Open in your browser, allow camera access, and your background blurs instantly. Use the virtual camera output in Zoom, Teams, Meet, or any video call app.
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WebP Converter — PNG & JPG to WebP
Compress images to WebP — Google's modern format — right in your browser. No server upload, no account. Works on PNG, JPG, and WebP files.
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XML Formatter & Beautifier — Prettify XML
Paste raw or compressed XML and instantly get clean, indented output. Validates well-formedness, highlights errors, and supports minification for production use.
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Yards to Meters Converter — Fast & Exact
Convert yards to meters (and meters to yards) with exact precision. Covers American football, fabric, swimming pools, golf courses, and more.