159 tools
All free online tools
Search the catalog or browse by category. Supported tools process in your browser—no signup required. Read each tool’s privacy note for how processing works.
159 results
Merge, split, compress, and edit PDFs locally—built for private documents.
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Merge PDF
Combine multiple PDFs into one file — privately in your browser.
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Split PDF
Extract page ranges or split every page into a ZIP of single-page PDFs.
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Compress PDF
Shrink PDFs for email and uploads — processing stays on your device.
Openarrow_forward PDF Metadata Editor
Change title, author, subject, and keywords without uploading your file.
Openarrow_forwardRemove Blank Pages
Clean scanned PDFs by detecting and removing near-blank pages.
Openarrow_forwardRotate PDF
Fix sideways scans by rotating all pages at once.
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Images to PDF
Turn photos and screenshots into a multi-page PDF — locally.
Openarrow_forward Extract PDF Pages
Pull specific pages into a new PDF — pick from a grid or type ranges.
Openarrow_forwardReorder PDF Pages
Rearrange pages before you share or print — privately on your device.
Openarrow_forwardPDF to Images
Export every PDF page as JPG or PNG in a ZIP archive.
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Compress PDF to Size
Hit upload size caps by stepping quality until you reach a target MB.
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Edit PDF
Add text, images, and shapes to your PDF — privately on your device.
Openarrow_forward Watermark PDF
Stamp confidential or brand text across every page — locally.
Openarrow_forwardDelete PDF Pages
Remove unwanted pages from a PDF — privately on your device.
Openarrow_forwardAdd Page Numbers
Add consistent page numbers to reports and merged packets.
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Protect PDF
Password-protect a PDF before you share it — encryption runs locally.
Openarrow_forward Unlock PDF
Remove a password you already know — we do not crack protected files.
Openarrow_forwardFlatten PDF
Turn fillable form fields into permanent page content.
Openarrow_forwardPDF to Grayscale
Convert color PDFs to grayscale for print or smaller files.
Openarrow_forwardPDF to Text
Copy text out of digital PDFs — not for image-only scans (use OCR).
Openarrow_forwardCrop PDF
Trim margins on every page with a simple percentage crop.
Openarrow_forwardOCR PDF
Recognize text in scanned PDFs locally with Tesseract (English).
Openarrow_forwardSign PDF
Add your signature image to a PDF page — locally, without an eSign service.
Openarrow_forwardRedact PDF
Cover sensitive areas with black boxes before you share a PDF.
Openarrow_forwardCompare PDF
Compare text from two PDF versions — locally.
Openarrow_forwardRepair PDF
Try to rebuild a problematic PDF by copying pages into a fresh file.
Openarrow_forwardPDF to PDF/A
Prepare a PDF for archival with flatten and metadata — best effort, not certified PDF/A.
Openarrow_forwardN-up PDF
Create 2-up or 4-up sheets for compact printing.
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Images
Compress, resize, convert, crop, and strip EXIF before you share.
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Image Compressor
Shrink JPG, PNG, and WebP files for the web and email — privately in your browser.
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Image Resizer
Resize images to exact dimensions for web, social, and thumbnails.
Openarrow_forward Image Converter
Convert images between JPEG, PNG, and WebP without leaving your device.
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EXIF Metadata Remover
Strip GPS, camera, and other embedded tags before you share a photo.
Openarrow_forward HEIC to JPG
Open iPhone HEIC photos as universal JPG files — decoded locally.
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Image Color Picker
Extract colors from any image instantly — click a pixel for HEX, RGB, HSL, and HSV.
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QR Code Generator
Generate QR codes from links or text and download a PNG instantly.
Openarrow_forward Image Cropper
Crop images to free or fixed aspect ratios — privately in your browser.
Openarrow_forwardRotate & Flip
Fix sideways photos with rotate and flip — no upload required.
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Compress to Size
Hit a target file size for forms and uploads — quality search runs locally.
Openarrow_forward Image to Base64
Encode images as Base64 data URLs for CSS and embeds — locally.
Openarrow_forwardBase64 to Image
Turn Base64 strings and data URLs back into downloadable PNG or JPG files — locally.
Openarrow_forwardSVG to PNG
Rasterize SVG graphics to PNG for slides, docs, and social — rendered on your device.
Openarrow_forwardSVG to JPG
Export SVG artwork as JPEG with adjustable quality and a solid background.
Openarrow_forwardSVG Viewer
Preview SVG graphics, zoom in, and inspect cleaned markup — safely in your browser.
Openarrow_forwardWatermark Image
Stamp text or a logo on photos before you share them.
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Developer
JSON, regex, JWT, passwords, and other local-first utilities.
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JSON Formatter
Paste JSON to validate, beautify, or minify instantly — privately on your device.
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Regex Tester
Write a pattern, set flags, and see matches and groups update live.
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Diff Checker
Find differences between two text files with unified or split views — like GitHub.
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Password Generator
Create cryptographically random passwords with length and character-set controls.
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JWT Decoder
Paste a JWT to inspect header, payload, and expiry — locally.
Openarrow_forward Hash Generator
Hash text for checksums and cache keys — locally with Web Crypto (MD5 for legacy checksums only).
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Base64 Encode / Decode
Convert text to Base64 and back — including URL-safe variants.
Openarrow_forward UUID Generator
Create one or many UUID v4 values for fixtures, IDs, and test data.
Openarrow_forwardURL Encoder / Decoder
Encode or decode URI components for query strings and path segments.
Openarrow_forwardCron Expression Generator
Assemble a standard cron schedule and get a plain-English field summary.
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YAML Formatter
Beautify and validate YAML — then copy JSON if you need it.
Openarrow_forward SQL Formatter
Break long SQL onto keyword lines for readable diffs and reviews.
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JWT Generator
Build a signed HS256 JWT from header claims, payload, and a secret.
Openarrow_forward URL Parser
Split a URL into components and query parameters for debugging.
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JSON Diff
Diff two JSON trees by path — locally, without uploading payloads.
Openarrow_forward Cron Parser
Explain minute, hour, day, month, and weekday fields from any classic cron string.
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Text
Word count, case convert, diff, cleaners, and light writing checks.
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Word Counter
Paste or type to count words, characters, sentences, and paragraphs. Reading and speaking time update live.
Openarrow_forward Character Counter
Track character count against common social and SEO limits while you write.
Openarrow_forwardWord Frequency
See which words appear most often and their density — useful for editing and light SEO checks.
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Text Diff Checker
Compare two drafts side by side — unified or split view, like GitHub.
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Case Converter
Switch between common letter cases and coding styles in one click.
Openarrow_forward Slug Generator
Convert a title or phrase into a clean, hyphenated URL slug.
Openarrow_forwardReverse Text
Flip text by character, word, or line for puzzles, checks, and formatting tricks.
Openarrow_forwardList Converter
Reformat lists between commas, lines, bullets, and numbers.
Openarrow_forwardROT13 Encoder
Apply ROT13 to letters A–Z. Run again to decode.
Openarrow_forwardText ↔ Binary
Translate between plain text and 8-bit binary codes.
Openarrow_forwardHTML Entity Encoder
Escape or unescape common HTML entities for safe display in markup.
Openarrow_forwardText Cleaner
Fix spacing and blank lines after pasting from docs, PDFs, or chat.
Openarrow_forwardFind and Replace
Search and replace across your draft with plain text or regular expressions.
Openarrow_forwardRemove Duplicate Lines
Deduplicate line lists for emails, URLs, tags, or inventory exports.
Openarrow_forwardRemove Empty Lines
Delete blank lines so your list or draft is compact.
Openarrow_forwardSort Lines
Alphabetize lists, names, tags, or any one-item-per-line text.
Openarrow_forwardRemove Line Breaks
Turn hard-wrapped text into a continuous paragraph with a separator you choose.
Openarrow_forwardAdd Line Numbers
Number every line for scripts, lyrics, logs, or review notes.
Openarrow_forwardExtract Emails
Scan pasted content and list unique email addresses found.
Openarrow_forwardExtract URLs
Collect unique web links from notes, emails, or scraped copy.
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Readability Checker
Measure how easy your text is to read with Flesch Reading Ease and grade-level estimates.
Openarrow_forward Passive Voice Checker
Find likely passive constructions so you can tighten unclear sentences.
Openarrow_forwardSentence Analyzer
See which sentences are long and hard to read, then break them up.
Openarrow_forwardFiller Words Checker
Spot fillers and -ly adverbs so you can cut fluff and sharpen tone.
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Spell Checker
Find likely misspellings against a local English word list and see simple suggestions.
Openarrow_forward Punctuation Checker
Scan for common punctuation and spacing issues before you publish.
Openarrow_forwardConfused Words Checker
Flag look-alike words so you can confirm you picked the right one.
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Design
Contrast, color convert, palettes, favicons, and CSS helpers.
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Contrast Checker
Test foreground and background colors against WCAG AA and AAA contrast requirements.
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Color Converter
Convert any color between HEX, RGB, and HSL with a live swatch.
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Color Palette Generator
Build harmonious palettes from one base color using classic color-theory modes.
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Image Color Picker
Extract colors from any image instantly — click a pixel for HEX, RGB, HSL, and HSV. No signup. No uploads.
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Favicon Generator
Create favicon sizes from a letter mark or image — entirely in your browser.
Openarrow_forward Box Shadow Generator
Tune a box shadow visually and copy the CSS in one click.
Openarrow_forwardGradient Generator
Build linear or radial gradients and copy ready-to-use CSS.
Openarrow_forwardBorder Radius Generator
Tune each corner independently and copy the border-radius CSS in one click.
Openarrow_forwardCSS Filter Generator
Adjust filter properties visually on a gradient preview and copy the CSS.
Openarrow_forwardCSS Unit Converter
Convert a CSS length to all common units using your root font size and viewport settings.
Openarrow_forwardText Shadow Generator
Tune text shadow offset, blur, and color with a live preview and copy the CSS.
Openarrow_forwardTypography Scale Generator
Pick a base size and scale ratio to generate type steps and export CSS variables.
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Calculators
Fitness, health, finance, math, and everyday estimates—with clear disclaimers.
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Tip Calculator
Find tip amount, total with tip, and equal split per person. Runs locally in your browser — no signup and no data sent to a server.
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Percentage Calculator
Solve percent-of, reverse percent, and percent change problems instantly. Processing stays on your device.
Openarrow_forward Discount Calculator
Enter the original price and discount percent to see savings and the final price. No signup — runs locally.
Openarrow_forwardGPA Calculator
Add courses with letter grades and credits to get a weighted GPA on the common 4.0 scale. All math stays in your browser.
Openarrow_forwardScientific Calculator
A browser-based scientific calculator for everyday math, trig, and logs. Runs locally — nothing is uploaded.
Openarrow_forwardAverage Calculator
Paste or type a list of numbers to get mean, median, mode, count, and sum. Processing stays on your device.
Openarrow_forwardUnit Price Calculator
Divide total price by quantity to get price per unit — useful for groceries and bulk buys. Runs in your browser.
Openarrow_forwardFuel Cost Calculator
Estimate how much fuel a trip needs and what it costs. Enter distance, efficiency, and price per gallon or liter — all local math.
Openarrow_forwardBMI Calculator
Compute body mass index from height and weight, then see the WHO screening category. Runs locally — not a clinical assessment.
Openarrow_forwardSalary to Hourly Calculator
Convert between annual salary and hourly pay using your hours per week and weeks per year. Gross figures only — no tax withholding.
Openarrow_forwardOvertime Pay Calculator
Estimate gross pay with regular and overtime hours at 1.5× or 2× multipliers. Not payroll or legal advice.
Openarrow_forwardProfit Margin Calculator
Find profit, profit margin, and markup from cost and price — or set a target margin to get the required sell price.
Openarrow_forwardBody Fat Calculator
Estimate body fat percentage from height and circumference measurements using the US Navy method. Private, local math — not a clinical diagnosis.
Openarrow_forwardIdeal Weight Calculator
Get a Devine-formula ideal weight estimate from height and sex. Screening math only — not a health target prescription.
Openarrow_forwardMacro Calculator
Convert a calorie target into protein, carbohydrate, and fat grams using your chosen percentages.
Openarrow_forwardProtein Intake Calculator
Multiply body weight by a grams-per-kilogram factor to estimate daily protein. Not dietary advice.
Openarrow_forwardWater Intake Calculator
Estimate daily fluid volume from body weight using a simple ml-per-kg rule of thumb.
Openarrow_forwardHeart Rate Zone Calculator
Estimate maximum heart rate and five training zones from age using the common 220 − age rule.
Openarrow_forwardSleep Cycle Calculator
Pick a wake-up time and see bedtime options based on ~90-minute cycles plus a short fall-asleep buffer.
Openarrow_forwardRunning Pace Calculator
Enter race or run distance and finish time to get average pace per kilometer and speed.
Openarrow_forwardPregnancy Due Date Calculator
Estimate a due date from the first day of the last menstrual period using Naegele’s rule (LMP + 280 days).
Openarrow_forwardOvulation Calculator
Estimate ovulation and a fertile window from last period date and average cycle length. Not contraception or medical advice.
Openarrow_forwardBreak-Even Calculator
Find how many units you need to sell to cover fixed costs given price and variable cost per unit.
Openarrow_forwardBudget Calculator
Add income and expense lines to see total spending and what remains.
Openarrow_forwardFreelance Rate Calculator
Work out a target hourly rate from desired annual income, yearly expenses, billable hours, and time off.
Openarrow_forwardFraction Calculator
Perform fraction arithmetic and simplify results automatically in your browser.
Openarrow_forwardGCF Calculator
Calculate the greatest common factor of two whole numbers using the Euclidean algorithm.
Openarrow_forwardLCM Calculator
Calculate the least common multiple of two whole numbers from their GCF.
Openarrow_forwardProbability Calculator
Enter probabilities between 0 and 1 for two independent events to get AND and OR results.
Openarrow_forwardCombination Calculator
Compute how many ways to choose r items from n when order does not matter (nCr).
Openarrow_forwardPermutation Calculator
Compute how many ordered arrangements of r items from n (nPr).
Openarrow_forwardZakat Calculator
Estimate zakat from total zakatable wealth and a nisab threshold using a configurable rate (default 2.5%).
Openarrow_forwardGold Zakat Calculator
Estimate zakat on gold holdings from grams, price per gram, and a nisab weight threshold.
Openarrow_forwardSalary After Tax Calculator
Apply a custom tax percentage to gross pay for a quick net estimate. Not official tax software.
Openarrow_forwardElectricity Cost Calculator
Multiply energy use (kWh) by your rate to estimate cost for a period you choose.
Openarrow_forwardCost of Living Calculator
Compare a home-city cost basket to another city’s basket using totals you provide — no external price database.
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Units
Length, weight, temperature, area, volume, speed, and more.
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Length Converter
Convert between metric and imperial lengths with live results for every unit.
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Weight Converter
Convert kg ↔ lbs and other mass units with exact international factors.
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Temperature Converter
See Celsius, Fahrenheit, and Kelvin update together as you type.
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Area Converter
Convert land and surface areas across metric and imperial units.
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Volume Converter
Convert cooking and liquid volumes between metric and US/UK units.
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Speed Converter
Convert everyday and aviation speeds with live results for every unit.
Openarrow_forward Pressure Converter
Convert tire, plumbing, and engineering pressures across common units.
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Energy Converter
Convert food, HVAC, and physics energy units in one live table.
Openarrow_forward Power Converter
Convert electrical and mechanical power units, including HVAC cooling tons.
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Data Size Converter
Convert bytes through terabytes with a SI vs IEC (binary) toggle.
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Date & Time
Timestamps, time zones, durations, age, and work-hours helpers.
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Unix Timestamp Converter
Convert epoch seconds or milliseconds to readable dates — and the other way around.
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Age Calculator
Find exact age in years, months, and days — plus days until the next birthday.
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Time Zone Converter
Pick a date and time in one zone and see the same moment across other cities.
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Time Difference Calculator
See how many hours and minutes separate two time zones on a given date.
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Date Calculator
Add or subtract time from a date, or count calendar and business days between two dates.
Openarrow_forward Week Number Calculator
Get the ISO week number and weekday for any calendar date.
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Countdown / Days Until
See how many days remain until an event — or how long since it passed.
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Hours Calculator
Find elapsed hours between a start and end clock time — overnight shifts included.
Openarrow_forward Time Calculator
Add or subtract hours, minutes, and seconds from any clock time.
Openarrow_forwardTime Duration Calculator
Measure elapsed time between two date-times down to the second.
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Work Hours Calculator
Get net shift hours after unpaid breaks — in hh:mm and decimal hours.
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Converters
CSV ↔ JSON and text to PDF—locally in your browser.