Tools for Developers & IT Pros
138 toolsNetwork diagnostics, browser testing, and hardware validation tools. DNS lookup, IP analysis, system diagnostics, display calibration, and accessibility checking.
OTP Auth QR Decoder
Decode a Google Authenticator / Authy QR screenshot back into its TOTP secret. Migrate to Aegis, 1Password or any other app. Runs in your browser.
KeePass Viewer
Open a KeePass .kdbx database in your browser. View entries, export to JSON / CSV, no installation. KDBX4 and KDBX3 supported.
Bitwarden Converter
Convert password vault exports between Bitwarden JSON, KeePass, Chrome, Firefox, 1Password and LastPass CSV. Runs in your browser, no installation.
Shamir Secret Sharing
Split a secret into N shares where any K of them reconstruct it. Browser implementation over GF(256) for master passwords and seed phrases.
Redact PDF
Black out data in a PDF: type a name and cover it on every page. Redacted text is removed from the file, not hidden under a box.
One-Time Secret Share
Share a secret via an encrypted link. AES-GCM 256-bit, decryption key lives in the URL fragment. No account, no database.
PGP Key Generator
Generate PGP / OpenPGP keys (RSA, Curve25519) in your browser. Encrypt, decrypt, sign and verify. Works with GnuPG, Thunderbird, ProtonMail.
PDF Editor
PDF editor online: change the text already in the document, sign it, fill a form, white out what should go, reorder pages. All in one pass.
Sign PDF
Add your signature to a PDF online: draw, type or upload it, drop it on the page, add the date and download the signed file. In your browser.
Verify PDF
Check whether a signed PDF has been altered. Upload the PDF and its verification seal to confirm the file is unchanged. In your browser. Free.
Merge PDF
Combine multiple PDFs into one file. Reorder pages, pick page ranges per file, rotate, add bookmarks. Fast, in your browser.
Split PDF
Split a PDF by pages, ranges, every N pages, or bookmarks. Preserves outlines and page labels.
Text Formatter
All-in-one text formatter: 60+ operations for case conversion, cleaning, encoding, fancy text. Runs in the browser.
Color Accessibility Checker
Pick two colors to check contrast ratio and colorblind visibility.
Colorblind Simulator
Upload an image to compare original and colorblind views side by side.
Keyboard Layout Converter
Convert between 12 keyboard layouts with auto-detection — QWERTY, Cyrillic, Korean, Arabic and more.
Typing Trainer
Free typing trainer with adaptive lessons, code mode, finger heatmap and certificate. QWERTY, Dvorak, Colemak. 10 languages.
OCR Text Extractor
Drop an image, PDF or a full folder — get editable text, Word, Excel or searchable PDF.
Online Protractor
Online protractor with transparent overlay and photo measurement — mm calibration, multi-angle, PNG/PDF/JSON export. Handy for builders, carpenters and students.
Online Ruler
Free online ruler in actual size. Calibrate to your screen and measure in cm, mm and inches — on screen or on a photo.
Archive Extractor
Open and extract ZIP, RAR, 7z, TAR and 70+ archive formats online, including password-protected ones. Preview files in your browser.
Archive Maker
Pack files and folders into ZIP, 7z, TAR.GZ or TAR.XZ: compression level, AES-256 password, split into volumes. Online, no install.
Archive Repair
Diagnose and repair damaged ZIP, RAR, 7z and TAR archives. Finds why the archive will not open and pulls out the files that survived.
Microsoft Access Database Recovery
Pulls tables and records out of damaged .accdb and .mdb files, even when the header or catalog is destroyed. Exports to Excel, CSV, JSON and SQL.
