PrivateTools
Word & Character CounterText · Count words, characters, sentences, reading time, speaking time, keyword density and writing progress.QR Code GeneratorGenerators · Create QR codes for URLs, text, Wi-Fi, contacts and events with local export.Secure Password GeneratorPrivacy · Generate strong Web Crypto passwords, passphrases and batches without sending anything away.Color & Contrast StudioAccessibility · Convert HEX, RGB, HSL, HSV and CMYK, test WCAG contrast and generate useful palettes.JSON Formatter & ValidatorDeveloper · Format, validate, minify and inspect JSON with precise browser-side parsing.Base64 Encoder / DecoderDeveloper · Encode UTF-8 text and files, decode Base64 and switch URL-safe mode locally.Hash GeneratorDeveloper · Generate MD5 compatibility checksums plus SHA-1, SHA-256, SHA-384 and SHA-512 digests locally.URL Encoder / DecoderDeveloper · Encode or decode URL components and inspect query parameters instantly.JWT DecoderDeveloper · Inspect JWT headers and payloads locally without verifying or uploading the token.Regex TesterDeveloper · Test JavaScript regular expressions, flags and matches directly in the browser.Diff CheckerDeveloper · Compare two text or code versions line by line entirely in the browser.UUID GeneratorDeveloper · Generate RFC 4122 UUID v4 identifiers locally with the browser cryptographic random source.Unix Timestamp ConverterDeveloper · Convert Unix seconds or milliseconds to dates and convert dates back to timestamps.HMAC GeneratorDeveloper · Create HMAC-SHA-256, SHA-384 and SHA-512 signatures locally with Web Crypto.IPv4 CIDR CalculatorDeveloper · Calculate network, broadcast, host range, mask and address count from an IPv4 CIDR.Hashtag WorkspaceCreator · Build, save and organize hashtag sets with transparent local relevance scoring.YouTube Creator UtilityCreator · Extract public thumbnails, check title/description length and build timestamps.Mortgage CalculatorFinance · Estimate payments, total interest, payoff time and amortization with scenario comparison.Loan CalculatorFinance · Compare loan payments, APR assumptions, total cost and accelerated payments.Compound Interest CalculatorFinance · Model recurring contributions and compound growth across years.Currency ConverterFinance · Convert currencies with timestamped daily reference rates and a 30-day history chart.Net Salary EstimatorFinance · Estimate take-home pay with configurable tax, social contribution and payroll deduction rates.Citation GeneratorAcademic · Create APA, MLA, Chicago, ABNT, ISO, DIN and NF-style citations with optional DOI/ISBN metadata lookup.GPA & Grade CalculatorAcademic · Calculate weighted GPA and compare common US, German and Japanese grading scales.Academic Word CounterAcademic · Count assignment words, estimate pages and optionally exclude a final references section.Bibliography BuilderAcademic · Build, sort and export a bibliography locally from multiple citation records.Merge PDFPDF · Combine multiple PDF files in your chosen order without uploading them.Split PDFPDF · Extract selected pages or page ranges into a new PDF locally.Rotate PDFPDF · Rotate selected PDF pages by 90, 180 or 270 degrees locally.Reorder PDF PagesPDF · Rearrange PDF pages into a new order without sending the file anywhere.Compress PDFPDF · Optimize PDF object streams, Flate compression and linearization locally with qpdf WebAssembly.Protect PDFPDF · Add AES-256 PDF passwords locally with qpdf WebAssembly.Unlock PDFPDF · Remove a known PDF password locally and download an unlocked copy.Extract Text from PDFPDF · Read selectable text from PDF pages locally with PDF.js.PDF to JPGPDF · Render PDF pages as high-quality JPG images directly in your browser.Images to PDFPDF · Combine JPEG, PNG, WebP or browser-readable images into a PDF locally.Watermark PDFPDF · Add a text watermark across every PDF page locally.Sign PDF VisuallyPDF · Place a signature image onto a PDF page locally. 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The language model may download on first use.Redact PDFPDF · Permanently cover sensitive regions by rasterizing the output locally so underlying page content is removed.PDF Scan CleanerPDF · Improve scanned PDF readability with grayscale and contrast cleanup locally.Image Palette ExtractorImage · Extract dominant colors from an image locally.Social Media Image ResizerImage · Center-crop and resize images for common social media dimensions locally.Blur ImageImage · Apply adjustable blur to an image locally and download the result.Pixelate ImageImage · Pixelate an image locally for stylization or obscuring visual details.Duplicate Image DetectorImage · Find byte-identical images locally using SHA-256 hashes.YAML to JSONData · Convert YAML to formatted JSON locally.JSON to YAMLData · Convert JSON to readable YAML locally.XML to JSONData · Parse XML and convert its structure to JSON locally.JSON to XMLData · Convert JSON objects to XML locally.Excel to CSVData · Read a spreadsheet locally and export the first sheet as CSV.CSV to ExcelData · Convert CSV data to an XLSX workbook locally.CSV Delimiter DetectorData · Detect comma, semicolon, tab or pipe delimiters locally.Missing Values AnalyzerData · Count blank values by CSV column locally.Remove Empty CSV RowsData · Remove completely empty CSV rows locally.CSV Date Format ConverterData · Normalize values in a selected CSV date column locally.SQL FormatterDeveloper · Pretty-print SQL locally with a dedicated formatter.SQL MinifierDeveloper · Remove comments and unnecessary whitespace from SQL locally.HTML FormatterDeveloper · Beautify HTML locally.CSS FormatterDeveloper · Beautify CSS locally.JavaScript FormatterDeveloper · Beautify JavaScript locally.JavaScript MinifierDeveloper · Apply a lightweight whitespace/comment minification pass locally.Nano ID GeneratorDeveloper · Generate URL-friendly random identifiers locally with Web Crypto.ULID GeneratorDeveloper · Generate sortable ULID-style identifiers locally.Cron 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SHA-256, SHA-384 and SHA-512 file hashes locally.Checksum VerifierPrivacy · Compare a file SHA-256 checksum against an expected value locally.Tracking URL CleanerPrivacy · Remove common UTM and click-tracking parameters from a URL locally.Local Text EncryptionPrivacy · Encrypt or decrypt text locally with PBKDF2 and AES-GCM using a password you choose.Accessible Palette GeneratorAccessibility · Generate tonal variants and check their contrast against a chosen background.HTML Accessibility CheckerAccessibility · Run a lightweight local static check for heading, image alt and link-text issues.Touch Target CheckerAccessibility · Check interface target dimensions against a common 44×44 CSS pixel reference.Accessible Font Size CalculatorAccessibility · Convert pixel font sizes to rem values and review body-text sizing.Reading Level AnalyzerAccessibility · Estimate reading ease and grade level for English prose locally.Reduced Motion HelperAccessibility · Generate a safe prefers-reduced-motion CSS starting point and implementation reminders.Title AnalyzerCreator · Measure title length and readability format without pretending to predict CTR.Social Character Limit CheckerCreator · Check content length against common publishing limits for major platforms.UTM Link BuilderCreator · Build campaign URLs with UTM source, medium and campaign parameters locally.Share Link CleanerCreator · Remove common tracking parameters before sharing a link.Aspect Ratio CalculatorCreator · Reduce image or video dimensions to a simple aspect ratio.SRT / VTT Subtitle ConverterCreator · Convert subtitle text between SRT and WebVTT locally.Subtitle CleanerCreator · Remove subtitle numbering and timestamps to recover clean transcript text.Transcript FormatterCreator · Clean spacing and paragraph breaks in transcript text locally.Timestamp List GeneratorCreator · Turn a list of segment names into a starter timestamp outline.Profit Margin CalculatorFinance · Calculate gross profit and margin from revenue and cost.Markup CalculatorFinance · Calculate markup percentage and gross profit from cost and selling price.Discount CalculatorFinance · Calculate sale price and savings from a percentage discount.Break-even CalculatorFinance · Estimate break-even unit volume from fixed costs and contribution per unit.ROI CalculatorFinance · Calculate simple return on investment from gain and cost.ROAS CalculatorFinance · Calculate return on advertising spend from revenue and ad cost.CPM CalculatorFinance · Calculate advertising cost per thousand impressions.CPC CalculatorFinance · Calculate advertising cost per click.CPA CalculatorFinance · Calculate advertising cost per acquisition or conversion.Customer Acquisition Cost CalculatorFinance · Calculate CAC from sales and marketing cost divided by new customers.Customer Lifetime Value CalculatorFinance · Estimate simple customer lifetime value from purchase value, frequency and years.Hourly to Salary CalculatorFinance · Estimate weekly, monthly and annual earnings from an hourly rate.Loan Amortization CalculatorFinance · Estimate monthly payment, total paid and total interest for a standard amortizing loan.Savings Goal CalculatorFinance · Estimate monthly saving needed to reach a target by a chosen date horizon.Inflation CalculatorFinance · Project an amount forward using a configurable annual inflation rate.Simple Rent vs Buy CalculatorFinance · Compare cumulative rent with a purchase price before ownership costs and appreciation.Import Cost CalculatorFinance · Estimate landed cost from goods value, a configurable duty rate and other costs.Shipping Cost CalculatorFinance · Estimate shipping cost from weight, rate per unit and fixed charges.Reference DeduplicatorAcademic · Remove duplicate bibliography lines locally after normalized comparison.Reference SorterAcademic · Sort bibliography lines alphabetically using normalized text.BibTeX CleanerAcademic · Normalize and reorder common BibTeX fields locally.BibTeX to RISAcademic · Convert common BibTeX entries to RIS locally.Citation Metadata InspectorAcademic · Detect DOI, ISBN, year and URL patterns in pasted citation text locally.
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Developer

IPv4 CIDR Calculator

Calculate network, broadcast, host range, mask and address count from an IPv4 CIDR.

Runs locally in your browser
Local processing activeNo account required
Network192.168.1.0/24
Subnet mask255.255.255.0
Broadcast192.168.1.255
Host range192.168.1.1 – 192.168.1.254
Total addresses256
Usable254
Clear by default

Built to finish the task, not trap your attention.

The interactive logic is isolated from the static page shell. Useful content arrives first, then only the tool interface that needs JavaScript becomes interactive.

  • No sign-up wall for core tools.
  • Responsive controls sized for touch and keyboard input.
  • Errors and results stay close to the action that produced them.
Accessible interaction

Focus states, semantic labels, reduced-motion support and responsive layouts are part of the base interface rather than optional polish.

Keep moving

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