Free Online Tools.
Zero Uploads.

Calculate exact age in years, months, and days. Find total days alive, the day of the week you were born, and your next birthday countdown.

Upscale images with a real neural network running in your browser — no uploads, no servers. Uses UpscalerJS with state-of-the-art Real-ESRGAN models for photographic detail restoration.

Convert between MP3, WAV, OGG, M4A, FLAC, and OPUS — all in your browser

Match a target loudness (LUFS) for streaming, voice, broadcast, or music — all in your browser.

Record audio from your microphone — no sign-up, no upload, saved directly in your browser.

Cut a section from an audio file — fast stream-copy or clean re-encode.

Remove image backgrounds instantly using AI — 100% in your browser. Choose transparent, solid color, or custom backgrounds. Your files never leave your device.

Encode and decode Base64 strings with image preview support

Calculate your Body Mass Index (BMI) using metric or imperial units. See your BMI category and a color-coded scale for context.

Calculate your daily calorie needs (BMR and TDEE) and macros

Convert text between different cases

Extract the dominant color palette from any image. Get hex, RGB, and HSL values. Export as JSON, CSS variables, or a Tailwind config snippet.

Pick colors and convert between HEX, RGB, HSL

Project investment growth with compound interest and regular contributions

Compute the cubic yards or metres of concrete for a slab, plus the number of 60-lb ready-mix bags. Perfect for footings, patios, walkways, and small slabs.

Convert cups ↔ grams ↔ ounces, oven temperatures (°F ↔ °C ↔ gas mark), and scale a recipe up or down by serving count — all in one tool.

Build linear, radial, and conic CSS gradients with live preview

Build multi-layer CSS box-shadows with live preview and copy-ready code

Filter, sort, dedupe, and export CSV files in your browser — no upload.

Convert a curl command into fetch, axios, Python requests, Go net/http, or PHP cURL — all in your browser.

Convert between 150+ world currencies using live exchange rates. Rates are cached for 4 hours. All calculations run in your browser.

Calculate the number of days between two dates (including business days and weeks), or add and subtract days from any date. Supports business-days-only mode.

Compare two texts and see the differences highlighted

Open .xlsx and .xls workbooks in your browser — no upload, no account. Switch sheets, read cached formulas, and export any sheet as CSV.

Remove GPS, camera model, date, and other hidden metadata from images

Blur or pixelate faces in a photo. Manual rectangles, no upload — you stay in control.

Generate a complete favicon pack (ICO, PNGs, webmanifest) from one image

Count boxes of laminate, hardwood, vinyl plank, or LVT for a room. Enter dimensions and the per-box coverage from your product label, plus a cut-waste buffer.

Compare the annual cost of driving a gasoline car versus an electric vehicle. Plug in your mileage, MPG, fuel price, kWh consumption, and electricity rate to see side-by-side savings.

Convert video clips to GIF online — free, instant, and 100% private. Supports MP4, WebM, MOV, AVI, MKV. Control FPS, resolution, speed, and loop count. All processing in your browser via FFmpeg WASM.

Compute your unweighted and weighted GPA on the US 4.0 scale. Enter classes, grades, and credits — honors and AP/IB courses get the standard +0.5 / +1.0 bonus.

Encode and decode HTML entities with reference table

Encode images to Base64 strings or decode Base64 strings back to images. Useful for embedding images in HTML, CSS, or JSON.

Compress JPEG, PNG, and WebP images in your browser. Reduce file size without sacrificing quality. Your images never leave your device.

Crop images with an interactive drag-and-drop crop overlay. Choose from aspect ratio presets (1:1, 4:3, 16:9) or use free crop. Download the result instantly.

Remove noise and grain from photos using adaptive bilateral filtering. Automatic noise-level detection plus manual strength control. 100% browser-side, instant, private.

Convert images between PNG, JPEG, WebP, SVG, and ICO formats. Instant in-browser conversion — no uploads needed.

Resize images to exact pixel dimensions, a percentage, or a social media preset. Supports PNG, JPEG, and WebP. Your images never leave your device.

Convert images to a PDF document. Supports JPEG, PNG, GIF, WebP, and BMP. Drag to reorder images before converting.

Upscale images 2× or 4× using high-quality bicubic interpolation plus adjustable sharpening — 100% in your browser. Fast, general-purpose, works on any image. Your files never leave your device.

Format, validate, and minify JSON data with syntax highlighting

Convert a JSON sample into TypeScript, Go, Python, Rust, and more — all in your browser.

Decode and inspect JSON Web Tokens

Calculate monthly payments, total interest, and total cost for any loan or mortgage. View a full amortization schedule with a principal vs. interest chart.

Generate placeholder text in paragraphs, sentences, or words

Write and preview Markdown with live rendering

Extract text from images and PDFs using OCR — 100% in your browser. Supports 20+ languages. Your files never leave your device.

Estimate gallons or litres of paint for a room. Enter length, width, and ceiling height; subtract doors and windows; choose coats and a waste buffer for confident purchases.

Generate strong, random passwords with customizable options

Reduce PDF file size by compressing images and content. Choose from three quality presets to balance file size and quality.

Fill AcroForm PDFs in your browser — text, checkboxes, radio groups, dropdowns, signatures. Export flattened or keep fields editable.

Combine multiple PDF files into one document. Drag and drop to reorder files before merging.

Remove hidden PDF metadata (title, author, producer, XMP) before you share.

Visually reorder, rotate, and delete pages in a PDF. Drag thumbnails to rearrange, then save the result.

Add page numbers and custom headers/footers to your PDF — with date, filename, and total-page tokens.

Draw black rectangles over content and export a true image-only PDF. The removed text is gone from the file, not just hidden.

Sign a PDF in your browser. Draw, type, or upload a signature, drop it onto any page, and export a flattened copy. Nothing uploads.

Extract specific pages from a PDF. Use the visual selector to click pages, or enter a page range like 1-3, 5.

Stamp your PDF with APPROVED, DRAFT, CONFIDENTIAL, or custom text — on every page or skipping the first.

Convert PDF pages to PNG or JPEG images. Select specific pages or export all pages at once.

Add a text or image watermark to every page of a PDF — client-side, no upload.

Calculate percentages instantly. Find what percent X is of Y, calculate X% of a number, or compute percent change between two values.

Calculate your due date and track pregnancy progress

Generate QR codes for URLs, text, WiFi, and contacts

Test regular expressions with real-time matching and highlighting

Convert an annual salary to an hourly rate or vice versa, plus daily/weekly/monthly breakdowns. Adjust hours-per-week and weeks-per-year for US (40 × 52) or EU norms (38 × 47).

Record your screen, window, or browser tab with optional audio — no watermark, no upload

Hide sensitive parts of a screenshot with black fill, blur, or pixelate — in your browser, no upload.

Paste a document and ask a question in plain language — the tool finds the paragraphs that match the meaning, not just the keywords. Runs a small AI embeddings model entirely in your browser.

Instantly detect whether text is positive or negative using a small AI model that runs entirely in your browser. Analyze product reviews, feedback forms, or your own drafts before sending.

Find the bedtime or wake time that ends with a complete 90-minute sleep cycle so you wake up feeling refreshed instead of groggy.

Resize one image to every social media preset at once — Instagram, TikTok, YouTube, LinkedIn, and more

Pretty-print and format SQL queries with dialect-aware rules

Redact names, organizations, locations, emails, and phone numbers from text using a small AI model running entirely in your browser. Ideal for scrubbing PII before sharing chat logs, tickets, or documents.

Remove duplicates, sort, trim, strip HTML, and more — all in one tool

Pull the most important sentences out of any text — articles, emails, meeting notes — using a small AI model running entirely in your browser. Extractive, deterministic, and private.

Count tiles for a floor or wall. Enter the area dimensions and tile size, then add a waste percentage for cuts. The tool shows both the exact and over-buy quantities.

Track weekly hours by day, subtract unpaid breaks, and split pay into regular and overtime at any threshold and multiplier. Useful for hourly workers and freelancers.

Convert times between any two timezones and compare multiple world clocks side by side. Uses the browser's built-in Intl API — no timezone library required.

Calculate tip amounts and split bills between any number of people. Choose a tip percentage or enter a custom amount.

Check whether text is toxic, insulting, threatening, or hateful before you post or share it. Runs a small AI model 100% in your browser — no account, no upload.

Convert between units of length, weight, temperature, and more

Convert Unix timestamps to dates and vice versa

Encode and decode URLs with a URL parser

Generate and inspect UUIDs (v1, v4, v7)

Compress video files online — reduce file size while keeping great quality. Supports MP4, WebM, MOV, AVI, MKV. 100% in your browser using FFmpeg WASM. Your files never leave your device.

Convert video files between formats — MP4, WebM, AVI, MOV, MKV. Choose video and audio codecs, quality preset, and resolution. 100% in your browser using FFmpeg WASM. Your files never leave your device.

Extract audio from any video file — MP3, WAV, AAC, OGG, or FLAC. 100% in your browser using FFmpeg WASM. Your files never leave your device.

Trim or cut video clips online — free, instant, and 100% private. Keep a selection or remove a section from MP4, WebM, MOV, AVI, MKV. Stream copy (fast) or re-encode (precise). All processing in your browser via FFmpeg WASM.

Estimate the rolls of wallpaper you need for a room. Enter perimeter and ceiling height, deduct doors and windows, and account for pattern repeat to avoid mid-job shortages.

Count words, characters, sentences, and paragraphs

Format and minify XML documents with syntax validation

Convert between YAML and JSON formats