Practical guides on files, formats, privacy and browser tools.
Inspect live 20 Hz to 20 kHz audio frequencies, peak dBFS levels, and harmonic clipping using the Web Audio API FFT spectrum analyzer.
Shrink MP4, MOV, and MKV video sizes by 60–85% directly in your browser using H.264 Constant Rate Factor (CRF) quantization.
Condense long UTM-tagged links into readable custom short URLs with instant QR code generation for print and slide decks.
Shift SRT and WebVTT subtitle timecodes forward or backward by exact milliseconds in your browser to fix audio-caption drift.
Inspect and scrub hidden EXIF APP1 headers, GPS latitude/longitude coordinates, camera serial numbers, and XMP tags from photos locally.
Scrub Authorization Bearer tokens, Set-Cookie headers, API keys, and POST passwords from browser .har network captures before sharing with support.
Scan QR codes and barcodes directly from uploaded screenshots or your device camera in the browser, and inspect the raw URL before opening.
Arrange multiple photos into balanced Bento grids, side-by-side before/after comparisons, and print sheets locally with exact gutter controls.
Sample photographs and UI references in your browser using colour quantization to export dominant HEX, RGB, HSL swatches and CSS variables.
Translate colours between HEX, RGB, and HSL while verifying WCAG 2.1 relative luminance contrast ratios (4.5:1 AA and 7:1 AAA) for readable UI type.
Remove duplicate rows, trim trailing whitespace, standardize date formats, and repair broken RFC 4180 quotes in large CSV exports locally.
Spot exact line and character changes between two config files, JSON payloads, or legal clauses in your browser using Myers LCS diffing.
Convert strings between UTF-8, Base64, URL percent-encoding, Hexadecimal, and HTML entities, or inspect JWT header and payload claims locally.
Export crisp 16×16, 32×32, 180×180 Apple Touch, and 512×512 PWA manifest icons from a single master SVG or PNG directly in your browser.
Trim MP4 or WebM clips, tune frame rate (10–15 FPS) and width, and quantize 256-colour palettes to create lightweight looping GIFs in browser.
Prettify minified JSON payloads, pinpoint RFC 8259 syntax errors by line and column, and traverse nested API objects in your browser.
Draft technical READMEs, tables, and fenced code blocks in CommonMark and GitHub-Flavored Markdown with instant side-by-side HTML preview.
Debug ECMAScript regex patterns in real time, inspect numbered and named capture groups, and prevent catastrophic backtracking on edge strings.
Add numbered step callouts, directional arrows, highlight boxes, and irreversible pixelation over API keys and PII before filing bug tickets.
How ephemeral browser-to-browser WebRTC data channels exchange encrypted payloads in RAM without accounts or central message databases.
Apply tiled or corner text and PNG logo watermarks across batches of photos and videos locally using HTML5 Canvas and WebAssembly.
Convert Ku-band and C-band downlink frequencies to L-band 950–2150 MHz STB intermediate frequencies and compute ITU-R rain attenuation.
Batch transcode PNG, JPEG, and WebP images directly in browser RAM while controlling chroma subsampling, alpha channels, and ZIP export.
Assemble scanned receipts, ID photos, and PNG diagrams into a paginated A4 or Letter PDF locally in your browser without server uploads.
Transcode uncompressed PCM WAV, lossless FLAC, and MP3 audio tracks in your browser while matching sample rates and bit depths.
Rasterize multi-page PDF documents into 150 DPI or 300 DPI PNG and JPEG images directly in your browser and download them as a ZIP archive.
Remux or transcode MKV, MOV, AVI, and WebM recordings into universally compatible H.264 MP4 files in your browser with FFmpeg WebAssembly.
Create custom SVG and PNG QR codes, Wi-Fi login matrices, UPI payment codes, and Code-128 barcodes with Reed-Solomon error correction.
Resolve official Microsoft Store ProductIDs and URLs into direct .msixbundle, .appx, and VCLibs/UI.Xaml dependency installers for offline PCs.
Create cryptographically random passwords and multi-word passphrases in your browser using window.crypto.getRandomValues() and Shannon entropy math.
Analyze real-time WebSocket OHLCV candlesticks, Wilder 14-period Relative Strength Index (RSI), and EMA crossovers without charting bloat.
Isolate subjects, portraits, and product cutouts into transparent 32-bit PNGs using in-browser WebGPU and WASM segmentation models.
Resize dozens of JPG, PNG, and WebP images simultaneously in your browser with aspect-ratio locking, high-quality resampling, and ZIP output.
Stream multi-gigabyte archives directly between browsers over DTLS-encrypted WebRTC SCTP data channels with zero cloud storage limits.
Apply visual signature stamps and cryptographic PKCS#7 / SHA-256 digital signatures to PDF contracts in your browser without uploading files.
Calculate and compare loan and bond interest accruals across Actual/365 (Fixed), Actual/360, Actual/Actual (ISDA), and 30/360 conventions in your browser.
Aggregate 100,000+ row GSTR-1 sales registers, marketplace CSVs, and ledgers in your browser by State, HSN, or GST rate with Pareto 80/20 analysis.
Reconcile bank statement CSVs against Tally or ERP ledgers in your browser using 3-pass matching (UTR, date window, tolerance) to build a formal BRS.
Convert messy HDFC, ICICI, SBI, and Axis bank CSV exports into ISO-8601 dates, split Debit/Credit columns, and extracted UTR/UPI payees locally.
Decompose Return on Equity (ROE) into Net Margin, Asset Turnover, and Equity Multiplier (plus 5-step EBIT/Tax/Interest burdens) and 22 CMA ratios.
Calculate selling price, COGS, gross profit margin (% of revenue), and markup (% of cost), and avoid pricing under-recovery when applying discounts.
Calculate compound interest with monthly rests at 3× the RBI Bank Rate under Section 16 of the MSMED Act and check Section 43B(h) tax disallowance.
Generate multi-year asset depreciation schedules under Companies Act Schedule II (WDV/SLM, 5% residual) and Income Tax Section 32 (<180 day rule).
Calculate statutory bonus under the Payment of Bonus Act, 1965 using the ₹21,000 eligibility ceiling, ₹7,000/Min-Wage calculation cap, and LOP proration.
Look up monthly and annual Professional Tax (PT) slabs across Maharashtra, Karnataka, Tamil Nadu, Telangana, West Bengal, and Gujarat under Article 276.
Compute employee and employer EPF (12%), EPS (8.33% capped at ₹1,250), EDLI, EPFO admin charges, and ESI (0.75% / 3.25%) for Indian payroll.
Calculate gratuity payouts under the Payment of Gratuity Act (15/26 vs 15/30 divisor), 6-month service rounding, and Section 10(10) tax exemption.
Calculate tax-exempt and taxable House Rent Allowance (HRA) under Section 10(13A) and Rule 2A, compare Metro vs Non-Metro caps, and print rent receipts.
Compute exact Indian TDS deductions, net vendor payouts, GST-exclusive bases, and Section 201(1A) late interest for FY 2024-25 and FY 2025-26.
Validate 10-character Indian PAN numbers and decode the 4th-character tax status (P for Individual, C for Company, F for Firm) for TDS rate checks.
Validate 15-character Indian GSTINs offline using the official Modulo-36 weighted checksum algorithm, state code lookup, and embedded PAN decoder.
Compare two revisions of a PDF contract, fee schedule, or regulatory filing side by side in your browser to catch altered clauses and numbers.
Complete interactive AcroForm text fields, checkboxes, and dropdowns in your browser and flatten the form so values cannot be edited or lost on print.
Trim excessive white margins, printer bleed marks, or old headers and footers from PDF pages in your browser by updating /CropBox coordinates.
Parse PDF content streams and /ToUnicode CMap tables in your browser to extract clean UTF-8 plain text with page markers and zero uploads.
Destroy sensitive names, account numbers, and clauses in PDF files locally by burning opaque redaction boxes into flattened page rasters.
Inspect and wipe hidden /Info dictionary fields (/Author, /Creator, /Producer, timestamps) and XMP XML packets from PDFs before publishing.
Decrypt your password-protected bank statements, e-Aadhaar letters, and credit card PDFs locally in your browser so you never re-type the password.
Lock confidential PDF tax returns, payslips, and legal agreements in your browser with User (open) and Owner (permission) passwords and zero uploads.
Stamp sequential Page X of Y footers or legal Bates numbers onto merged PDF bundles locally in your browser with custom margins and starting offsets.
Apply customizable diagonal DRAFT, CONFIDENTIAL, or recipient-named text watermarks across PDF pages in your browser with exact opacity control.
Pull non-contiguous pages (such as a cover page, summary table, and signature sheet) from a large PDF into one clean new document in your browser.
Remove trailing blank sheets, cover ads, or confidential annexures from a PDF locally in your browser and prune unreferenced page objects.
Visually drag, reorder, rotate, or remove misplaced pages inside a PDF document locally in your browser by rewriting the /Pages kids array.
Rotate individual sideways tables or entire upside-down scanned PDF documents by 90°, 180°, or 270° losslessly in your browser and save permanently.
Mask the first 8 digits of your 12-digit Aadhaar card on PDFs and images locally in your browser to comply with UIDAI KYC privacy guidelines.
Reduce bloated PDF file sizes in your browser by deflating object streams, stripping redundant metadata, and downsampling oversized bitmaps.
Slice multi-hundred-page PDFs into custom page ranges or individual single-page files directly in your browser without uploading sensitive data.
Combine multiple PDF invoices, annexures, and scanned contracts into one file locally using pdf-lib page tree copying without server uploads.
