Fast client-side utilities for text, numbers, dates, images, PDFs, and developer workflows. Everything runs in your browser.
Routes, navigation, RSS, and sitemap are generated from a single tool registry.
179 browser utilities, ready for more.
Analyze numeric data with summary statistics, percentiles, a histogram and an interactive distribution workspace.
Read resistor bands, find colors from a resistance value, and compare a measured value with its tolerance range.
Multiply matrices, find determinants and inverses, and solve linear systems with visible row operations.
Translate text and Morse code, inspect signal timing, and create adjustable practice audio.
Turn task dependencies into a working-day schedule, Gantt chart and critical path with clear float estimates.
Build a round robin schedule with court assignments, rest rounds and a complete match timetable.
Split a roster into random or score-balanced teams with repeatable draws, team comparisons and CSV export.
Plan dough ball weights, hydration and starter contributions with an exact mixing formula and hydration comparison.
Arrange parts on stock bars with kerf and end allowances, visual cutting layouts, offcut totals and purchase costs.
Evaluate expressions, track history, and handle quick arithmetic without leaving the page.
Convert between common length, weight, area, volume, speed, and temperature units.
Scale servings locally, convert cups and grams by ingredient, adjust pan size, and export a kitchen-ready shopping list.
Convert major currencies using a local offline rate snapshot you can edit and store in the browser.
Compare dates, count days, and add or subtract precise offsets from a base date.
Calculate exact age, total days lived, next birthday timing, milestones, and age gaps from one local page.
Compare two time zones and preview meeting times across major cities.
Convert Unix timestamps into local or UTC time and turn readable dates back into seconds or milliseconds.
Create calendar event files locally with timezone-aware scheduling, reminders, guests, and recurrence presets.
Build, validate, and explain 5-field cron expressions with upcoming run previews.
Create QR codes locally with custom size, colors, margin, and downloadable SVG or PNG output.
Create Code 128, EAN-13, and UPC-A barcodes locally with validation, batch rows, and SVG or PNG export.
Generate multiple strong passwords with configurable character sets and instant strength hints.
Decode JWT header and payload locally, inspect common claims, and preview token timing without verification.
Create HMAC-signed JWTs locally, edit claims, and verify pasted tokens against the same shared secret.
Sign messages locally with HMAC, switch encodings, verify expected signatures, and preview prefixed headers.
Generate single or batched UUID v4 values and copy them in the format you need.
Hash text or files locally with standard SHA algorithms and compare against an expected digest.
Test regular expressions against sample text with flags, group capture details, and replace previews.
Validate, format, minify, and recursively sort JSON while tracking payload stats.
Inspect JSON structure locally, inventory every field path, search nested values, and copy exact node paths.
Generate TypeScript types from JSON locally with optional-field inference, naming controls, and path-level audits.
Infer JSON Schema locally from sample JSON, tune draft and strictness options, then validate another payload against it.
Format SQL locally, switch keyword casing, preview structure, and inspect query metadata without sending queries anywhere.
Convert CSV or TSV rows into JSON objects locally with header-based keys and copy-ready output.
Find duplicate CSV or TSV rows locally, choose matching columns, and export a cleaned file plus the repeated rows.
Turn JSON arrays into CSV locally with nested key flattening, field selection, and spreadsheet-ready downloads.
Compare two text blocks line by line, spot additions or removals, and copy the filtered output you need.
Encode or decode UTF-8 text and files, with optional URL-safe output and data URL support.
Convert integers between bases 2 and 36 locally with prefix detection, grouped binary, byte previews, and copy-ready literals.
Create, inspect, preview, and decode data: URLs locally from text or files with ready-to-paste embed snippets.
Encode, decode, and inspect URL query parameters without sending data anywhere.
Build campaign URLs locally, preserve existing query parameters, and validate UTM naming before sharing.
Create prefilled email links locally with recipients, subject, body templates, and copy-ready snippets.
Audit email lists locally with typo suggestions, role and disposable flags, duplicate cleanup, and export-ready valid results.
Build polished email signatures locally with live previews, client-safe HTML, install steps, and copy-ready text output.
Draft subject lines locally, preview inbox clipping, flag risky wording, and tune the paired preheader before you send.
Create shareable contact cards locally with live previews, QR export, and downloadable .vcf files.
Draft Open Graph and Twitter card metadata locally with live previews, snippet output, and launch checks.
Draft page title, description, canonical, robots, and social metadata with live SERP and card previews.
Preview Google-style snippets locally with pixel-width checks, mobile and desktop cards, and query-term highlighting.
Build JSON-LD for articles, FAQs, products, events, and organizations with live previews and launch checks.
Build hreflang clusters locally, generate HTML or HTTP header output, and audit pasted alternate tags for gaps.
Draft robots.txt rules locally with presets, multi-bot groups, sitemap links, and path match previews.
Parse pasted robots.txt rules locally, simulate crawler access, and audit path patterns before you publish changes.
Build XML and TXT sitemaps locally, normalize large URL lists, and audit duplicates or weak page coverage before launch.
Audit content clarity, reading grade, keyword density, and SERP snippet length from one local workspace.
Split pasted values, clean and deduplicate them, then export lines, CSV, JSON arrays, or SQL IN lists locally.
Compare options locally with weighted criteria, live rankings, decisive-factor analysis, and share-ready exports.
Estimate meeting cost by attendee role, preparation time, and recurrence, then compare leaner attendance and break-even scenarios.
Turn income goals, business costs, taxes, time off, and billable capacity into sustainable hourly, daily, and project rates.
Convert distance and finish time into pace, build kilometer or mile splits, and compare race predictions and pacing strategies.
Parse raw request or response headers locally, inspect security and cache signals, and review cookie or CORS details.
Transform text into common writing and developer naming styles with one click.
Sort, shuffle, filter, trim, and deduplicate pasted lines locally with a duplicate report and export-ready output.
Build Markdown tables visually, paste CSV or TSV, and import JSON rows without leaving the browser.
Write Markdown locally with live preview, heading outline, document stats, and copy-ready HTML output.
Generate placeholder paragraphs, sentences, or words locally for mockups, docs, and content drafts.
Count words, lines, characters, reading time, and repeated keywords as you type.
Calculate BMI in metric or imperial units and view healthy weight guidance for the same height.
Plan bedtimes, wake-up times, and naps locally with sleep-cycle suggestions, age-based targets, and a practical bedtime checklist.
Estimate body fat locally with the Navy method, compare it to a BMI-based estimate, and review lean-mass target scenarios.
Handle percentage-of, ratio, and percent-change calculations from one page.
Calculate savings growth, compound interest, loan payments, total interest, and payoff schedules locally.
Estimate mortgage payments, compare payoff scenarios, and inspect amortization details with taxes, insurance, PMI, and extra payments.
Estimate room cooling load locally with room dimensions, climate, insulation, sun exposure, occupancy, and appliance heat gains.
Estimate wall and ceiling paint by room, subtract doors and windows, compare can sizes, and build a cost-ready shopping plan locally.
Model debt payoff locally with extra-payment scenarios, payoff-date forecasts, strategy comparisons, and a month-by-month schedule.
Plan course outcomes locally with final-exam targets, weighted category tracking, scenario tables, and export-ready summaries.
Convert HEX, RGB, and HSL values instantly with a live preview and copy-ready output.
Check WCAG contrast ratios, preview real UI text, and generate accessible color alternatives locally.
Build and audit a color palette locally with pairwise contrast checks, token previews, and color-vision simulations.
Build linear, radial, or conic gradients locally with multi-stop controls, live UI previews, and copy-ready code.
Create favicon PNG sizes locally from text, emoji, or an uploaded image, then copy ready-to-use HTML and manifest snippets.
Compose, edit, play, import, and download short MIDI patterns directly in the browser.
Resize images locally with aspect-ratio controls, format selection, quality tuning, and download output.
Crop images locally with drag selection, aspect presets, rotation, coordinate controls, and export-ready social sizes.
Convert images between PNG, JPEG, and WebP locally with optional resizing and quality controls.
Compress photos locally with side-by-side previews, format switching, transparency checks, and quick quality profiles.
Inspect photo metadata locally, flag GPS or device details, and download a cleaned image without EXIF.
Extract text from images locally with multilingual OCR, preprocessing controls, confidence stats, and line-by-line exports.
Check dead pixels, stuck pixels, backlight bleed, gradients, uniformity, sharpness, and color patterns in fullscreen.
Test your microphone locally with live input level, frequency activity, clipping alerts, and a short recording preview.
Run a local moving target test for monitor response speed, ghosting, blur, and inverse ghosting checks.
Combine multiple PDF files in the browser, reorder them, and download one merged document.
Turn JPG, PNG, or WebP images into a downloadable PDF locally with reorder controls.
Combine PDF pages and image files in one visual sequence, reorder pages, and export a new PDF.
Extract selected page ranges from a PDF into a new document without uploading the file.
Render PDF pages into downloadable JPG images directly in the browser.
Inspect SVG markup, preview it safely, clean editor noise, and export a lighter responsive asset locally.
Convert SRT and WebVTT locally, shift timestamps, renumber cues, and inspect subtitle timing before export.
Build API requests locally with headers, query params, auth helpers, and copy-ready cURL, fetch, or Axios snippets.
Parse pasted cURL commands locally, inspect request parts, mask secrets, and export fetch, Axios, or Python requests code.
Reduce ratios, scale widths or heights, compare common presets, and preview responsive frames locally.
Analyze IPv4 CIDR blocks locally with subnet masks, usable ranges, binary breakdowns, and child subnet planning.
Compare semantic versions, test version ranges, and sort release lists locally with stable and prerelease insight.
Format, minify, validate, and inspect XML locally with structure stats and tag summaries.
Build Content Security Policy headers locally with presets, directive editors, risk checks, and copy-ready output.
Model cross-origin requests locally, generate CORS response headers, and audit risky policy combinations before shipping.
Parse .env or INI files locally, audit duplicate keys, mask likely secrets, and export normalized JSON or shell snippets.
Convert Unix permission modes locally with octal and symbolic editing, special bits, and file or directory behavior notes.
Inspect Unicode text locally with normalization previews, invisible character detection, code point tables, and byte counts.
Profile CSV or TSV data locally with column type inference, missing-value checks, duplicate detection, and top-value summaries.
Turn titles into clean slugs locally with batch processing, collision checks, URL previews, and redirect-ready mappings.
Compare source and target JSON locally, draft RFC 6902-style patch operations, and verify the patched result before shipping.
Detect emails, phones, cards, IPs, tokens, and JWTs locally, then mask or relabel them before sharing text.
Inspect pasted HTML locally for headings, links, metadata, image alt coverage, and quick SEO risk signals.
Plan URL redirects locally with path normalization, chain detection, platform-ready rules, and migration test cases.
Track work shifts locally with break-aware hour totals, weekly overtime, pay estimates, and export-ready summaries.
Build polished invoices locally with live totals, reusable line items, payment tracking, and PDF or CSV export.
Split rent fairly with room-size weights, shared-cost adjustments, deposit planning, and roommate-ready summaries.
Track recurring subscriptions locally with monthly cost rollups, renewal timing, sharing adjustments, and cut-first planning.
Model pricing locally with margin, markup, break-even units, platform fees, tax, discounts, and target-profit scenarios.
Model break-even units locally with fixed-cost line items, per-unit variable costs, pricing scenarios, safety margin, and target-profit planning.
Plan a monthly budget locally with category targets, savings-rate tracking, 50/30/20 comparison, and shareable summaries.
Project retirement savings locally with contribution planning, employer match, real-return assumptions, and income-gap checks.
Estimate take-home pay locally with salary or hourly inputs, overtime, deductions, tax rates, and annualized comparisons.
Calculate sales tax or VAT locally with tax-inclusive or tax-exclusive pricing, editable line items, reverse totals, and receipt-ready summaries.
Estimate appliance energy use locally with tiered utility rates, fixed fees, standby load tracking, and monthly or annual bill summaries.
Model Etsy listing, transaction, processing, Offsite Ads, and currency fees locally with take-home profit, target-price ladders, and share-ready summaries.
Estimate calories locally with TDEE, body-fat-aware BMR, goal targets, macro splits, meal plans, and weekly adjustment guidance.
Estimate a due date locally from LMP, conception, IVF transfer, or a known due date, then review weeks, trimester, and milestone planning.
Project PTO locally with accrual or flat allowance rules, company holidays, planned trips, rollover risk, and monthly balance forecasts.
Run local focus sessions with a task queue, custom work and break cycles, progress tracking, and a daily session log.
Split a check locally with tip, tax, uneven shares, smart rounding, settle-up transfers, and a share-ready summary.
Run a local typing test with timed rounds, preset or custom passages, live WPM and accuracy, and a session log you can review or export.
Convert YAML and JSON locally, inspect multi-document files, audit paths, and export normalized output without sending configs anywhere.
Track net worth locally with editable assets and liabilities, category rollups, liquidity checks, and timeline snapshots.
Estimate EV charging cost locally with charge-session math, home vs public comparisons, time-by-charger previews, and gas-car savings.
Build local checklists with templates, bulk task import, owners, due dates, priority filters, and exportable progress summaries.
Track attendance percentage, see how many classes you can miss, model how many you must attend, and compare multiple subjects in one local dashboard.
Build a complete site.webmanifest locally with install metadata, icon planning, shortcuts, screenshots, and audit-ready output.
Track semester GPA locally with credit-weighted courses, cumulative carry-over, weighted scale options, and target GPA planning.
Model sales commission locally with flat or tiered rates, quota accelerators, split payouts, goal seeking, and export-ready summaries.
Compare package sizes locally with tax and coupon adjustments, target-quantity planning, and a share-ready savings summary.
Plan trip costs locally with fixed and daily categories, per-traveler breakdowns, budget pacing, and a share-ready summary.
Estimate boxes room by room, add packing buffer, check vehicle capacity, and build a costed moving plan locally.
Plan multi-leg driving costs locally with fuel economy, tolls, round trips, passenger splits, and vehicle comparisons.
Size a backup plan locally with source data, growth, retention, compression, media capacity, transfer time, and 3-2-1 checks.
Build a repeating shift calendar locally, add date exceptions, compare day and night hours, and export the schedule as CSV.
Estimate solar generation, electricity-bill savings, roof capacity, payback time, and backup-battery needs locally.
Build a local seed-starting, transplanting, direct-sowing, succession, and harvest calendar from your frost dates.
Estimate household water use, utility costs, fixture impact, and practical savings scenarios locally.
Catalog household belongings locally, estimate current and replacement values, and check insurance coverage gaps by room and category.
Compare driving, public transit, and cycling by monthly cost, annual time, emissions, and bike payback.
Turn a mixed laundry basket into safe washer loads, detergent amounts, drying time, energy cost, and a practical batch plan.
Estimate stored-item volume, account for stacking and access space, compare unit sizes, and forecast monthly and annual cost.
Plan water, soft drinks, beer, wine, spirits, mixers, ice, cooling space, and budget for an event.
Plan daily portions for multiple pets, split dry and wet food, account for treats, and forecast packages, cost, stock duration, and reorder timing.
Plan bedtime or wake time around sleep cycles, estimate weekly sleep balance, and set caffeine and nap cutoffs.
Build an essential-device power budget, estimate battery runtime, check peak load, and model daily solar recharging for an outage.
Track food stock, expiry dates, consumption pace, waste risk, and a practical restock list in one local planner.
Turn recurring home-care tasks into due dates, overdue alerts, a 12-month calendar, and a realistic maintenance budget.
Turn exam dates, available hours, subject difficulty, confidence, and progress into a balanced daily revision schedule.
Build a timed event run sheet with owners, transition buffers, readiness checks, and a downloadable crew schedule.
Arrange guest groups across tables, protect party preferences, track accessibility and meal requests, and export a venue-ready seating list.
Track vehicle service by date and mileage, spot overdue work, forecast upcoming costs, and export a practical maintenance plan.
Build a trip-aware packing list, scale quantities for travelers and laundry, track bag weight, and finish packing with fewer surprises.
Organize room-by-room cleaning tasks, see what is overdue, balance weekly effort, and export a practical cleaning schedule.
Measure multiple rooms, account for exclusions and layout waste, round up full boxes, and build a practical flooring budget.
Measure multiple walls, account for doors, windows, pattern repeats, and trimming, then calculate whole rolls and project cost.
Map household waste by stream, test diversion habits, check bin capacity, and focus reduction efforts where they matter most.
Track bicycle care by date and distance, flag overdue checks, forecast service costs, and export a ride-ready maintenance plan.
Plan gifts by recipient, deadline, and budget; track purchases, group contributions, and what still needs attention.
Plan event food by guest mix and menu, then calculate portions, package counts, dietary coverage, and a practical budget.
Plan curtain panels for multiple windows, calculate fabric cuts with pattern matching, and compare material costs.
Estimate knitting or crochet yarn from a weighed swatch, group project pieces by color, and plan whole-skein purchases.
Plan candle batches by container, compare fragrance percentage bases, and calculate materials, purchases and costs.
Plan multi-model print jobs, filament purchases and production costs with a failure allowance.
Compare two shipping quotes using actual weight, dimensional weight and parcel-level billing rules.