All Tools
218 tools for files, text, code and calculations. Choose a category or search for what you need to do.
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PDF Tools
12- Add Page Numbers to PDFAdd page numbers to a PDF in your browser, position, format and font size on a picker, your file stays local.
- JPG to PDF ConverterArrange your images in the order you want and create a PDF.
- PDF CompressorOptimize PDF structure and compare file sizes before and after.
- PDF MergerCombine PDFs into one document in the order you choose.
- PDF Password RemoverRemove password protection and unlock your PDF file directly in your browser.
- PDF SplitterSave selected PDF pages or page ranges as separate files.
- PDF to JPG ConverterConvert PDF pages into high-resolution JPG images directly in your browser.
- Redact PDFRemove selected PDF text and download a redacted copy locally.
- Reorder PDF PagesPut PDF pages in the right order and remove unwanted pages.
- Rotate PDFRotate PDF pages in your browser, your file never leaves your device.
- Searchable PDFScan in, searchable PDF out. The page image stays pixel for pixel, and on top of it sits text you can select, copy and find.
- Sign PDF onlinePlace your signature in a PDF and save the document.
Markdown Converters
10- CSV CleanerMojibake umlauts, semicolon vs comma, decimal commas, fixed in one pass, fully on-device.
- CSV to MarkdownConverts CSV, TSV or TAB into a Markdown table. Comma, semicolon and tab, locally in the browser.
- DOCX to MarkdownConverts Word documents to Markdown, headings, lists, tables, bold and italic preserved.
- HTML to MarkdownConverts an HTML file or pasted source to Markdown, locally in the browser.
- Markdown CleanerRemove, redact or replace sensitive terms across 1 to 100 Markdown files, all in your browser tab, before you share them.
- Markdown to DOCXGenerates structured DOCX from markdown, headings as real Word style refs, not bold text.
- Markdown to HTMLTurns markdown into HTML, body fragment for your CMS or standalone file with embedded styles.
- Markdown to PDFGenerates PDF from markdown via the browser print path: vector output, embedded fonts, no server.
- PDF to MarkdownConvert PDF content to Markdown for notes, wikis and further editing.
- XLSX to MarkdownTurn XLSX, XLS and ODS into Markdown. Every sheet in one file, locally in the browser.
Images
31- AI Image CleanerStrips C2PA, prompts and EXIF without changing a single pixel.
- AI Image DescriptionDrop a photo, get a finished alt text. A specialized neural network describes your image, entirely on your device, never on a server.
- AI Image DetectorReads what the file itself says about its AI origin.
- AI Image UpscalerEnlarge images with AI that estimates additional detail.
- Attention HeatmapDrop an image, get a heatmap. A specialised neural network predicts which spots pull the most attention in the first seconds, right on your device, with no upload.
- Convert JPG to AVIFConvert JPG images to AVIF directly in your browser to reduce file size.
- Convert JPG to WebPConvert JPG files to WebP in your browser with adjustable quality and file size.
- Convert PNG to AVIFAVIF beats PNG on file size, and keeps the alpha channel.
- Convert PNG to WebPConvert PNG images to WebP in your browser while preserving transparency.
- Convert WebP to PNG or JPGSome app refuses to open your WebP. Turn it into PNG or JPG.
- Crop ImageDrag a frame over the picture, lock it to a ratio or type the four pixel values, and download the cut at full resolution.
- Depth Map from PhotoDrop a photo, get a depth map. A specialized neural network estimates per-pixel depth from a single image, no stereo camera needed, entirely on your device.
- EXIF ViewerSee what your photos actually carry, camera, lens, GPS coordinates, capture time, all as a searchable tree.
- Favicon GeneratorDrop a logo, pick a PWA mask shape, extract a theme-color, and download the full favicon set plus HTML snippet as a ZIP, without the file ever leaving the browser tab.
- Find Duplicate PhotosPhoto library full? Drop your images in, the tool groups exact and similar photos, suggests one to keep per group, and shows how much space you reclaim. Everything stays on your device.
- HEIC to JPG ConverterConvert iPhone photos into a more widely supported format.
- HEIC to PNG ConverterConvert HEIC to PNG, when every single pixel counts.
- Image DiffCompare two images pixel by pixel and highlight differences in a heatmap.
- Image Format ConverterCompare and convert images between WebP, AVIF, PNG, and JPG.
- Image ResizerResize images to the dimensions you need, individually or in batches.
- Image to TextExtract and copy text from images and screenshots with OCR.
- JPG CompressorReduce JPG file size and compare the result with the original.
- Photo to Coloring PageTurn a photo into a coloring page you can print.
- Pixelate ImageDrag a box over every spot that has to go, give each box mosaic, blur or a solid bar, and download the image at full resolution.
- PNG CompressorPick lossless or lossy, see the difference, download the smaller file, transparency stays.
- QR Code GeneratorTurn links and Wi-Fi details into QR codes you can share.
- Remove Image BackgroundCut out the person, trash the background. The AI runs on your device, not our servers.
- Remove MetadataDetects EXIF, GPS, author and XMP in JPG, PNG, WebP and PDF, and removes them on demand.
- Segment AnythingClick, drag a box, or add multiple refinement points, a specialized segmentation model finds the object contour and delivers mask, cutout, and inverse mask as lossless PNGs.
- SVG OptimizerEditor exports balloon SVGs with comments, metadata, and 60-digit decimals. We strip the noise without rewriting your art.
- SVG to PNGPick a pixel size, set the background behaviour, drop any number of files, everything stays inside your browser tab.
Video
09- Blur Video BackgroundBlur the background of your video directly in your browser.
- Compress VideoCompress videos to MP4 with adjustable quality or target size.
- Convert Video FormatConvert everything, upload nothing, right in your browser.
- HEVC to H.264 ConverterConvert HEVC videos to the more widely supported H.264 MP4 format.
- Remove Video BackgroundRemove video backgrounds directly in your browser without a green screen.
- Video Object DetectionUpload your video, pick the classes you care about, and get exportable bounding boxes with timestamps, all local, no server upload.
- Video to Audio ConverterPull the audio track from any video, right in your browser.
- Video TrimmerFind the right slice, watch it back, export it, without anyone else seeing your video.
- Webcam Background BlurBlur the background of your webcam image.
Audio
06- Audio Silence RemoverDrag-and-drop, three sliders, a waveform with silent regions highlighted in warm tint, and a WAV export with no server upload. Built for podcasters, voice memos, and language practice.
- Audio TranscriptionTurn interviews and voice recordings into editable text.
- Audio TrimmerSelect the audio section you need, listen to it and download it.
- Fast English TranscriptionEnglish audio, faster than real-time, without a single second leaving your device.
- Speech EnhancerReduce background noise and improve speech clarity directly in your browser.
- Text to SpeechWritten text as spoken voice: instantly, in your browser, no account required.
Text
12- AI Text DetectorDoes this text sound too smooth? Check if ChatGPT wrote it.
- Case ConverterType some text, every one of twelve cases appears below in real time, with proper AP/Chicago title case and smart acronym tokenisation.
- Character CounterCount characters, words, and reading time in your text against platform limits.
- Crossword puzzle makerCreate a printable crossword from your words and clues.
- Flesch Reading EaseHow readable is your text. Really? Four readability formulas, a CEFR level and a plain-language traffic light, all running in your browser without uploading a single word.
- Lorem Ipsum GeneratorGenerate placeholder Lorem Ipsum text by paragraphs, sentences, or words.
- Morse Code TranslatorOne dot, one dash, a gap, a whole language. Works both ways, plays the audio, teaches you the code.
- NATO Phonetic AlphabetAlfa, Bravo, Charlie. Or Anton, Berta, Cäsar? Spell names and codes clearly over the phone. With audio, a printable A4 card and a quiz, all in your browser.
- Roman Numeral ConverterConvert numbers from 1 to 3999 to Roman numerals, or convert Roman numerals back.
- Text Diff ToolCompare two text versions and see what was added or removed.
- Word CounterCount words and characters, and estimate reading time and token count.
- Word UnscramblerEnter your letters and find possible words by length, score and filter.
Color
03- Color PickerOKLCH picker with P3 gamut warning. WCAG and APCA against light and dark side by side. EyeDropper, image pick, deuteranopia preview and code snippets in one pure-client tool.
- Hex to RGB Color ConverterThe designer sent you a hex code, but your framework demands RGB.
- WCAG Contrast CheckerCheck color contrast between text and background against WCAG 2.1 AA and AAA levels.
CSS Generators
07- Box-Shadow GeneratorDesign multi-layer CSS box shadows visually and copy the CSS code.
- CSS Animation BuilderBuild CSS keyframe animations visually and export CSS or Web Animations code.
- CSS Gradient GeneratorDesign gradients, compare previews and copy the CSS.
- CSS Grid GeneratorSubgrid aligns card headers without JavaScript. Container queries respond to container width, not viewport. Together they make layouts that hold up in 2026.
- CSS Shadow GeneratorBox, text and drop in one workbench. Contrast gate against unreadable halos. light-dark() instead of hex compromise.
- Flexbox PlaygroundExperiment with CSS flexbox layout properties and export CSS or Tailwind code.
- Text-Shadow Generatortext-shadow only, but deep: neon, 3D, letterpress, neo-brutalism. Five-size stage. Halo gate against unreadable glows.
Code Formatters
05- CSS Formatter, Beautifier & MinifierFormat CSS code with readable indentation directly in your browser.
- JSON DiffCompare two JSON payloads and highlight differences by key path and value.
- JSON Formatter & Validator OnlineFormat JSON for easier reading and spot syntax errors.
- SQL Formatter & BeautifierSomeone sent you a 200-line SQL string with no line breaks. Let's make it readable.
- XML Formatter & BeautifierFormat, indent, or minify XML markup and identify syntax errors.
Data Converters
06- Base64 Encoder and Decoder OnlineEncode text as Base64 or decode it back into readable text.
- CSV to JSONComma or semicolon, period or comma, BOM or no BOM, four standards, one converter. The leading zero in a postal code survives because the column stays a string instead of a number.
- JSON to CSV ConverterYour boss wants the API data in Excel, but you only have nested JSON arrays.
- TOML to JSONFour TOML datetime types that other converters flatten into strings stay intact here. Comments survive as JSON5. Cargo manifests and pyproject.toml files get non-blocking sanity checks.
- URL Encoder & DecoderEncode and decode URLs and query parameters using standard percent-encoding.
- YAML to JSONThe `NO` trap from YAML 1.1 is visible. Anchors and merge keys are visualised. Kubernetes, Compose, GitHub Actions and Helm files get profile-specific hints instead of generic errors.
Passwords & Hashing
11- AES EncryptionEncrypt and decrypt text with AES-GCM directly in your browser.
- Caesar CipherThree letters forward in the alphabet, that was Caesar's whole secret. Here you crack it in seconds and see exactly how the math behind it works.
- File Hash CheckerGenerate a hash, verify against an expected value, or compare two files, all in the browser, even for files over 2 GB.
- Hash GeneratorCalculate text hashes and compare the results from different algorithms.
- htpasswd GeneratorPassword hashes for Apache and nginx, bcrypt with cost-12 default, webserver toggle against wrong algorithm choice, batch mode for whole teams.
- JWT DecoderDecode JWT headers, claims and timestamps into readable information.
- Nano-ID GeneratorSeven alphabet presets, five use-case recipes, length slider 8-64, bulk-generate up to 10 000, plus a Birthday-Paradox collision calculator in the same UI.
- Random Number GeneratorOne number between 1 and 100, or six out of 49, no duplicates, sorted, rolled in your browser.
- ROT13/ROT47Decode spoilers, read geocaching hints, practise classroom cryptography, all three classic ciphers in a single-page view.
- Secure Password GeneratorGenerate random passwords with your choice of length and characters.
- UUID GeneratorGenerate UUIDs for test data, databases and API requests.
Meta Tags & SEO
06- Clean Tracking URLYou share a link. Three marketing systems want to listen in. We cut them out.
- Meta Tag GeneratorTitle, description, Open Graph, Twitter Card, Schema.org JSON-LD, and hreflang, four framework outputs (HTML, JSX, Astro, Svelte) with a four-way live preview.
- OpenGraph GeneratorCompose tags visually, check per-platform limits live, render an OG image in the browser, and emit Schema.org Article JSON-LD from the same tab: everything in-page, no upload, no account.
- robots.txt GeneratorCompose user-agent stacks visually, block AI bots cleanly or allow them as a citation source, with a validator catching the typical foot-guns (case mismatch, deprecated tokens, blocked CSS/JS).
- SEO Title CheckerWrite a title, count pixels, never get truncated in the SERP, all in one tab.
- UTM Link BuilderThree people tag the same newsletter, three sources show up in GA4. We fix that.
Server & DevOps
10- .htaccess checkerUnderstand an inherited.htaccess line by line before you touch it. With a URL test and a chain check.
- .htaccess GeneratorChoose redirects and server rules to build your .htaccess file.
- Cron Expression BuilderFour dialects, one editor. Timezone next-run preview included. DST no longer disappears silently.
- Cron timezone converterGenerate cron expressions for any time zone and target schedule.
- Crontab checkerThe whole file at once, not one line at a time. With a warning when several jobs sit on the same minute.
- gitignore GeneratorMultiple stacks, one file. 2026 templates maintained first-party. Diff mode, source attribution and a.gitattributes companion built in.
- HTTP Status CodesRFC standard and platform codes in one tool, with confusion cards for the four most common traps and code snippets for six languages.
- Internet Speed TestDownload, upload, ping, bufferbloat, plus a plain-language translation of what those numbers actually mean for your day.
- MIME Type FinderBidirectional lookup, in-browser magic-byte detection, and snippet export for five server stacks, all local, no file upload.
- nginx Config GeneratorCompose server blocks visually, pick a TLS profile, switch on HTTP/3 and WebSocket, or paste an existing.htaccess and convert it to nginx directives automatically.
AI & LLM
02Finance
25- Amortization CalculatorCalculate monthly loan payments, interest costs, and your full amortization schedule.
- Car Lease Payment CalculatorCalculate the lease factor from monthly payment and list price, with an optional down payment.
- Cash Discount CalculatorCalculate early payment cash discounts, invoice savings, and the effective annual interest rate.
- Cash Flow Calculator for BusinessCalculate operating and free cash flow using the direct or indirect method.
- Compound Interest CalculatorCalculate compound interest, total contributions, and future balance over time.
- Discount CalculatorCalculate final price, percentage savings, and sale discounts quickly.
- German Child Support CalculatorEstimate German child support using the Düsseldorfer Tabelle 2026 guidelines.
- German Commuter Allowance CalcEstimate Germany's commuter allowance from your commute distance and working days.
- German Compulsory Share CalculatorEstimate the statutory compulsory inheritance share under German law (§2303 BGB).
- German Parental Allowance CalculatorEstimate German parental allowance, ElterngeldPlus, and partnership bonus months.
- German Pension Deferral Calculator for Age 70A Germany-specific retirement-age model: monthly deferral bonus, extra pension points and break-even in one browser-only calculator.
- German Real Estate Transfer Tax Calculator 2026Calculate German property transfer tax across all 16 federal states from the purchase price.
- German Vehicle Tax CalculatorEstimate German vehicle tax based on engine size, fuel type, and CO2 emissions.
- Hourly Wage to Annual Salary CalculatorConvert hourly wage into annual salary based on your weekly working hours.
- Inheritance & Estate Tax Calculator 2026Estimate German inheritance tax and allowances based on tax class and relationship.
- Interest CalculatorCalculate simple and compound interest returns on your savings over time.
- Loan Payment CalculatorCalculate monthly payments, interest and the total cost of your loan.
- P/E Ratio CalculatorCalculate the price-to-earnings (P/E) ratio from stock price and earnings per share.
- Paycheck Calculator 2026Estimate your take-home pay and deductions in the US or UK.
- Receipt Price TrackerTrack grocery receipt prices across stores and compare unit costs locally.
- ROI CalculatorCalculate return on investment (ROI) percentage and net profit from your project.
- Sales Tax & VAT CalculatorConvert between net and gross amounts and see the VAT.
- SEO ROI CalculatorConservative, realistic, and optimistic side by side. With AI Overview adjustment and an honest ranking ramp.
- Stamp Duty Calculator UK 2026Calculate precise property purchase taxes across England, Scotland, and Wales with official band schedules.
- US Mortgage CalculatorPrincipal, interest, taxes, insurance, PMI and HOA in one breakdown, plus affordability, refinance break-even and amortization on a single page.
Math
01Construction & Renovation
17- Concrete CalculatorMulti-element volume, strength-class suggest, mix ratio and ready-mix threshold in one step, the concrete calculator that gives you the spec the plant expects.
- Fence CalculatorFour material variants in one tool, slope correction for post spacing and depth, WPC privacy strips module for twin-bar mesh, and an A4 material list as PDF.
- Heating Cost CalculatorEstimates yearly and monthly heating cost for six fuel classes, with overrideable 2026 defaults, a heat-pump JAZ slider, a CO₂ price trajectory and a transparent assumptions box.
- Insulation CalculatorBidirectional R-Value ↔ U-value, IECC climate-zone check and material smart-suggest in one, the insulation calculator that handles US, UK and DACH together.
- Laminate CalculatorPattern-aware waste, AC rating per use case and dye-lot reminder, the laminate calculator that does the real DIN math.
- Lumber CalculatorSix wood species with density lookup, project-specific wastage corridors, DIN 4074-1/-5 mapping, Q1/2026 price corridors and bill-of-materials export, for DIYers and carpenters.
- Masonry CalculatorCalculate the bricks and mortar your walls will need.
- Mortar CalculatorFour mortar types, application surcharge +0/+20/+30 % per LZR, mixing water per sack, and a mortar-group wizard for M5/M10/M15 per DIN EN 998-2.
- Plaster CalculatorSix plaster types with datasheet densities, DIN V 18550-1 substrate defaults, mixing water per sack, and an A4 material list as a print-ready PDF.
- Roof Area CalculatorSeven roof forms with live cross-section sketches, form-sensitive wastage hints, optional PV output and DIN 18338 measurement toggle for DIY and trades.
- Screed CalculatorPick a screed type, get DIN-correct minimum thickness, drying time per floor finish and underfloor-heating compatibility, works for UK sand-and-cement screed and US self-leveling underlayment alike.
- Staircase CalculatorDIN 18065 and ÖNORM B 5371 compliance in one input, three step rules on a tolerance band, DIN 18040 accessible mode, print-ready cut-section PDF at 1:20 / 1:50 / 1:1.
- Tile CalculatorEstimate tiles and materials, including an allowance for waste.
- Vinyl Flooring CalculatorPattern-aware waste, use-case smart-suggest and bidirectional mil-mm wear layer, the LVP / LVT calculator that picks the material with you.
- Wall Paint CalculatorSurface factor, color intensity, class recommendation per room and smart-pack picker, the wall paint calculator with real DIN EN 13300 + ASTM D2486 depth.
- Wallpaper CalculatorPattern-repeat-aware drop math, paste recommendation per wallpaper type, and dye-lot reminder, the wallpaper calculator that does the real math.
- Window U-Value CalculatorCompute Uw for windows and balcony doors per DIN EN ISO 10077-1. Compare German GModG/BEG and Passive House Institute thresholds, with a live glass-to-frame area split.
Time
10- Age CalculatorHow old am I to the day. And when was Grandma my current age? Both answers without an account, no upload, no leap-year fudging.
- Countdown TimerFour modes in one tool: single, multi, Pomodoro, event. Background-accurate via system clock, live tab-title countdown, Web Audio alarm. Pure-client, survives reload.
- Date CalculatorHow many days until Christmas? What weekday was 9 November 1989? Three clean modes, ISO 8601-compliant, all entries stay in the browser.
- Days to HoursOne day is 24 hours. A week is 168. Four weeks is 672. With decimal and D:HH:MM side by side, sprint plans and shift rosters line up without mental math.
- Hours to MinutesEight hours of full-time work is 480 minutes. A school lesson runs 45 minutes. With decimal and HH:MM:SS side by side, timesheets and contracts line up without mental math.
- Months to DaysSix months of trial period is 183 days. Nine months of pregnancy is 274 days. When you count the days, you know exactly when a deadline lands.
- Time Zone ConverterFind the corresponding time in different time zones.
- Unix Timestamp ConverterConvert Unix timestamps to readable dates and times, or turn dates into timestamps.
- Working-Days CalculatorHow many working days does this period contain in your state? Includes a bridge-day leverage detector and home-office allowance check, every input stays in the browser.
- Years to DaysConvert years to days using a 365-day, Julian or tropical year.
Length
08- Centimeters to Inches ConverterConvert measurements between centimeters and inches.
- Feet to Meters ConverterConvert feet to meters or meters back to feet with the exact conversion factor.
- Inches to Centimeters ConverterConvert inches to centimeters with the exact international definition.
- Kilometers to Miles ConverterConvert distances between kilometers and miles.
- Meters to Feet ConverterConvert lengths between meters and feet.
- Millimeters to Inches ConverterConvert millimeters to inches and inches to millimeters with exact factors.
- Nautical Miles to Kilometers ConverterConvert nautical miles to kilometers with the international standard factor.
- Yards to Meters ConverterConvert yards to meters with the exact international definition.
Weight
05- Grams to Ounces ConverterConvert grams to ounces and ounces to grams for cooking and shipping.
- Kilograms to Pounds ConverterConvert weights between kilograms and pounds.
- Metric Tons to Pounds Converter (t to lbs)Convert metric tons to pounds and pounds to metric tons accurately.
- Pounds to Kilograms ConverterConvert pounds to kilograms and kilograms to pounds with exact factors.
- Stone to Kilograms ConverterConvert British stone and pounds to kilograms and kilograms back to stone.
Area
03Volume
03- Cubic meters to cubic feet1 m³ equals 35.3147 ft³. Easy, until a 40-foot container arrives and nobody knows how many liters it holds.
- Liters to Gallons ConverterConvert volumes between liters and US gallons.
- Milliliters to Fluid Ounces ConverterConvert milliliters to fluid ounces and fluid ounces to milliliters.
Temperature
03Health
03- BMI CalculatorCalculate BMI from height and weight and view the age-group classification.
- Dog Age CalculatorIs your seven-year-old Labrador really middle-aged, and why do Great Danes age twice as fast as Chihuahuas? Three calculators, one breed database, no account.
- Pregnancy Week CalculatorHow far along am I? Three inputs (LMP, conception or ultrasound), gestational age in W+D, trimester, projected due date and post-birth wellness windows.
Education
02Automotive
01Nature & Astronomy
02Cooking & Baking
01Personality
04- Attachment Style TestSee where your answers fall between seeking closeness and keeping your distance, as a point on a map rather than a label.
- Free IQ Test & Multiple IntelligencesSolve reasoning questions and get a profile of your results.
- Love Language TestFive ways to show affection, scored for giving and for receiving. Your results appear right away, and nobody asks for your email.
- Male Archetypes TestAnswer 48 statements and get a profile of your three strongest archetypes.