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. This is a visual signature, not a certificate-backed digital signature.Remove PDF MetadataPDF · Clear common PDF metadata fields and save a sanitized copy locally.Add PDF Page NumbersPDF · Add page numbers to every PDF page with configurable position and size.Flatten PDF FormsPDF · Flatten supported interactive PDF form fields into the document locally.Repair PDFPDF · Reload and rewrite readable PDFs to a fresh document structure locally.Compare PDF TextPDF · Compare text extracted from two PDFs and highlight line-level differences locally.Compress ImageImage · Compress JPEG, PNG, WebP or AVIF images locally with quality control and batch processing.Convert Image FormatImage · Convert images between JPEG, PNG, WebP and AVIF without uploading them.Resize ImageImage · Resize one or many images to a maximum width while preserving aspect ratio.Crop ImageImage · Crop images by precise percentages and combine crop with resize, rotate or conversion.Rotate & Flip ImageImage · Rotate and flip images locally with no upload.Remove Image MetadataImage · Strip most embedded image metadata by decoding and re-encoding locally.Favicon GeneratorImage · Generate browser, Apple and PWA favicon sizes plus manifest and HTML snippets locally.CSV ViewerData · Open CSV data locally, detect delimiters and inspect rows in a responsive table.CSV CleanerData · Trim whitespace, remove empty rows and normalize CSV records locally.CSV DeduplicatorData · Remove duplicate CSV rows locally using all columns or a selected key.Merge CSV FilesData · Combine compatible CSV files into one dataset directly in the browser.Split CSVData · Split a large CSV into smaller files by row count and download the parts.CSV to JSONData · Convert CSV rows to formatted JSON locally.JSON to CSVData · Convert an array of JSON objects into a downloadable CSV locally.OCR Scanned PDFPDF · Extract text from scanned PDF pages locally with Tesseract OCR. 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 BuilderDeveloper · Build and copy standard five-field cron expressions locally.Cron ExplainerDeveloper · Break a five-field cron expression into its individual fields.URL ParserDeveloper · Inspect protocol, host, path, hash and query parameters locally.Query String BuilderDeveloper · Convert key=value lines into an encoded query string locally.CSP Policy HelperDeveloper · Normalize a Content Security Policy and flag broad unsafe directives.CORS Header AnalyzerDeveloper · Inspect pasted CORS response headers for common configuration conflicts.PEM InspectorDeveloper · Decode a PEM block locally, show DER size and calculate a SHA-256 fingerprint.JSON Schema GeneratorDeveloper · Infer a basic JSON Schema structure from example JSON locally.Passphrase GeneratorPrivacy · Generate memorable random passphrases locally with cryptographic randomness.Password Strength AnalyzerPrivacy · Estimate password entropy and flag obvious weak patterns locally.File Hash CalculatorPrivacy · Calculate 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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Studio

Developer Studio

Fast local utilities for JSON, tokens, regex, hashes, timestamps, identifiers and networks.

27 tools
Developer JSON Formatter & ValidatorFormat, validate, minify and inspect JSON with precise browser-side parsing. Open tool Developer Base64 Encoder / DecoderEncode UTF-8 text and files, decode Base64 and switch URL-safe mode locally. Open tool Developer Hash GeneratorGenerate MD5 compatibility checksums plus SHA-1, SHA-256, SHA-384 and SHA-512 digests locally. Open tool Developer URL Encoder / DecoderEncode or decode URL components and inspect query parameters instantly. Open tool Developer JWT DecoderInspect JWT headers and payloads locally without verifying or uploading the token. Open tool Developer Regex TesterTest JavaScript regular expressions, flags and matches directly in the browser. Open tool Developer Diff CheckerCompare two text or code versions line by line entirely in the browser. Open tool Developer UUID GeneratorGenerate RFC 4122 UUID v4 identifiers locally with the browser cryptographic random source. Open tool Developer Unix Timestamp ConverterConvert Unix seconds or milliseconds to dates and convert dates back to timestamps. Open tool Developer HMAC GeneratorCreate HMAC-SHA-256, SHA-384 and SHA-512 signatures locally with Web Crypto. Open tool Developer IPv4 CIDR CalculatorCalculate network, broadcast, host range, mask and address count from an IPv4 CIDR. Open tool Developer SQL FormatterPretty-print SQL locally with a dedicated formatter. Open tool Developer SQL MinifierRemove comments and unnecessary whitespace from SQL locally. Open tool Developer HTML FormatterBeautify HTML locally. Open tool Developer CSS FormatterBeautify CSS locally. Open tool Developer JavaScript FormatterBeautify JavaScript locally. Open tool Developer JavaScript MinifierApply a lightweight whitespace/comment minification pass locally. Open tool Developer Nano ID GeneratorGenerate URL-friendly random identifiers locally with Web Crypto. Open tool Developer ULID GeneratorGenerate sortable ULID-style identifiers locally. Open tool Developer Cron BuilderBuild and copy standard five-field cron expressions locally. Open tool Developer Cron ExplainerBreak a five-field cron expression into its individual fields. Open tool Developer URL ParserInspect protocol, host, path, hash and query parameters locally. Open tool Developer Query String BuilderConvert key=value lines into an encoded query string locally. Open tool Developer CSP Policy HelperNormalize a Content Security Policy and flag broad unsafe directives. Open tool Developer CORS Header AnalyzerInspect pasted CORS response headers for common configuration conflicts. Open tool Developer PEM InspectorDecode a PEM block locally, show DER size and calculate a SHA-256 fingerprint. Open tool Developer JSON Schema GeneratorInfer a basic JSON Schema structure from example JSON locally. Open tool