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Fast, no-signup, privacy-friendly utilities that run entirely in your browser. Pick a category to get started.
Start with these free calculators and generators. More tools are being added every week.
Find your precise age in years, months, and days — plus weeks lived, day of week you were born, and a countdown to your next birthday.
Calculate your Body Mass Index in metric or imperial units and see which WHO category it falls into.
Four percentage calculations in one tool: percent of a number, what percent A is of B, A is X% of what number, and percent change.
Calculate a tip with tax handling, round the total, switch currencies, and split the bill evenly between any number of people.
Calculate the monthly payment, total interest, and total cost of any fixed-rate loan.
Drop bank or credit-card statement CSVs, map the columns, categorize transactions, summarize cashflow, flag duplicates, and export clean finance reports.
Estimate a home loan payment with principal, interest, taxes, insurance, PMI, HOA fees, and optional extra principal.
Estimate US federal income tax with current 2025 and 2026 brackets, deductions, credits, and effective rates.
See how a lump sum plus optional monthly contributions grows over time with compounding.
Enter a target, a timeline, and an expected return — we'll solve for the monthly contribution you need to hit it.
Convert between metric and imperial units of length, weight, and temperature — see every common unit at once.
Count words, characters, and paragraphs with live reading time, most-used words, and SEO limit checks.
Paste JSON to pretty-print, validate, minify, or sort keys. Errors land on the exact line and column with a helpful hint.
Drop multiple CSV files, validate their headers or supply your own, merge every row, analyze the columns, and download one clean CSV.
Test any text and background color pair against WCAG 2.2 AA and AAA contrast requirements, with instant pass/fail feedback and a live preview.
Translate any color between HEX, RGB, and HSL with live sliders, an interactive picker, and copy-ready CSS strings — all calculated in your browser.
Pick any two dates and get the difference in years, months, days, weeks, business days, and total hours — plus whether the end date is past or future.
Create classic Lorem Ipsum placeholder text for mockups, wireframes, and prototypes. Pick paragraphs, sentences, or words, wrap in HTML, and copy with one click.
Convert between plain text and Base64 in either direction. Handles full UTF-8, the URL-safe variant, and works entirely in your browser — no uploads, no tracking.
Paste a JSON Web Token to split it into header, payload, and signature. Timestamps like exp and iat are formatted into readable dates, and the claim table shows every field at a glance. Runs entirely in your browser.
Convert any Unix epoch number into a date, or any date into an epoch. Handles both seconds and milliseconds, shows ISO 8601, UTC, local, and relative formats, and ships with a live now-clock plus quick references for start-of-day, week, month, and year.
Sweep a clean sine wave across the audible spectrum and find the highest frequency you can still hear. Use the slider, presets, or fine-adjust buttons to dial in a tone, then mark the highest pitch you heard. The result is matched against typical age-correlated cutoffs.
Play a steady reference tone at any frequency between 20 Hz and 20 kHz with your choice of waveform. Useful for tuning, calibration, speaker tests, or simply learning what each waveform sounds like. The browser does the synthesis — no plugin or download needed.
A quick way to confirm your left and right channels are wired correctly. Play a tone on either side individually, on both at once, or pan it back and forth across the stereo field. Useful for headphones, speakers, car audio, and surround setups.
Confirm your microphone is connected, picking up sound, and at a healthy level. The tool requests permission to your input device, displays a live meter with peak hold, and warns if the signal is clipping or silent. No audio is recorded or uploaded — everything stays in your browser.
Browser audio is never instant — there's a delay between scheduling a sound and hearing it. This tool reports the latency the browser admits to (base and output, in milliseconds), then runs a tap-along test that includes the full chain: scheduling, output buffering, the audio device itself, and the speaker. Useful for music apps, games, video calls, and rhythm games.
Generate strong random passwords or memorable passphrases. See entropy bits and estimated crack time — everything runs locally in your browser.
Cut out the subject from any photo and download a transparent PNG. The model runs entirely on your device — your image is never uploaded or stored.
Shrink JPG, PNG, and WebP files with a live quality slider and a side-by-side preview. Everything runs in your browser — no upload, no signup, no watermark.
Type or paste any URL, Wi-Fi credential, contact card, or message and get a downloadable QR code. Colors, error correction, and margin are all under your control — no upload, no signup, no watermark.
Create v4 random or v7 time-ordered UUIDs in any quantity. Output is generated locally with the browser's crypto API — no upload, no signup, no rate limits.
A free in-browser photo editor with adjustments, filters, transforms and crop. Drag in any image, tweak it live, and download — no uploads, no account, no watermark.
A free in-browser meme and collage maker with real layers. Paste screenshots straight from the clipboard, drag and resize each one, crop down to the part you want, and stack classic meme captions on top. Export to PNG, JPEG, or WebP — nothing leaves your device.
Convert HEIC, JPG, PNG, WebP, GIF, BMP, and AVIF photos to any format. Batch up to 25 files at once — your images never leave your device.
Inspect the camera, lens, exposure, GPS, and timestamps embedded in any photo — then strip the metadata with one click. Everything runs in your browser.
Remove EXIF, GPS, camera, timestamp, and editing metadata from batches of photos before you share them.
Drop in one image and get every favicon size a modern site needs — favicon.ico, PNG sizes for browsers, Apple, and Android, plus paste-ready HTML and manifest snippets.
Resize a whole batch of photos at once — set a target width, height, percentage, or longest-side limit, and the tool processes everything in your browser without an upload.
Add arrows, callouts, rectangles, freehand drawings, and labels on top of any photo or screenshot — drag to reposition, undo any time, export as PNG, JPG, or WebP.
Stamp a text caption or logo onto a batch of photos — pick from nine corner positions or a tiled repeat, dial in size and opacity, and export at full resolution.
Drop in a JPG, PNG, WebP, GIF, or SVG to get a Base64 data URL with copy-paste snippets for CSS, HTML, and Markdown — or paste a Base64 string to decode it back to a downloadable image.
Drop in a photo or screenshot, hover for a magnified loupe, click to pick a pixel — copy HEX, RGB, or HSL, and assemble a palette of up to 20 colors as paste-ready CSS variables.
Drop in two images and reveal the difference with a draggable divider, lay them out side-by-side, or fade one over the other — useful for design reviews, retouch passes, and before/after photography.
Drop in a photo and crop it with one of twelve aspect presets — Instagram square, 9:16 story, 16:9 YouTube thumbnail, Facebook cover — or freeform. Drag the rectangle, resize from any corner, then export at full source resolution as JPG, PNG, or WebP.
Rotate any photo by exact degrees, flip horizontally or vertically, and export the result at full source resolution — no upload required.
Drop two images and highlight every changed pixel. Adjust the threshold to ignore minor compression noise, see the exact change percentage, and export the diff as PNG.
Loan, mortgage, interest, tax, and investment calculators.
Age, countdown, time-zone, duration, and timestamp tools.
JSON, regex, hashes, base64, JWT, and code formatters.
Color pickers, palettes, gradients, contrast, and CSS helpers.
Passwords, UUIDs, QR codes, lorem ipsum, and names.
Hearing range, tone generator, channel test, microphone, and latency.
Background remover, image converters, and on-device photo utilities.
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