Before sharing a draftMask contact details before pasting text into a ticket or message.
PRIVATE UTILITIES / INDEX 01—40
Keep the task.
Lose the trail.
A focused collection of browser tools for the small digital jobs that should stay small—and stay on your device.
NO UPLOADNO SIGN-UPNO DETOUR
FEATURED OPERATION / 01LIVE ↗
TEXT / PRIVATE
Send the draft to [email protected] before 192.168.1.2 expires.
INPUTLOCALOUTPUT
Send the draft to [REDACTED EMAIL] before [REDACTED IP] expires.
TEXT REDACTORMask sensitive patterns without an upload.
OPEN TOOLLOCAL FIRST◆USEFUL ALWAYS◆YOUR DATA, YOUR TAB
TOOL SWITCHBOARD / 02
Pick an operation.
Finish the job.
01Privacy ToolsPassword StrengthSee what makes a password resilient.02GeneratorsPassphrase GeneratorGenerate seven random words from a curated 7,776-word list.03GeneratorsSecure RandomGenerate random strings with Web Crypto.04Privacy ToolsPassword EntropyUnderstand search space in seconds.02Privacy ToolsEmail Privacy MaskerShare contact details without oversharing.06Privacy ToolsText RedactorFind and mask sensitive patterns locally.07Encode & DecodeBase64 EncoderEncode and decode UTF-8 text.03Encode & DecodeURL EncoderSafely prepare query parameters.04Inspect & AnalyzeJWT DecoderInspect headers and payloads — locally.10Inspect & AnalyzeHash GeneratorCreate SHA-256, SHA-384 or SHA-512 hashes.11Developer UtilitiesHMAC GeneratorSign messages in your browser.12Encode & DecodeHTML Entity ToolEncode special characters safely.05Inspect & AnalyzeUnicode InspectorExplore code points and bytes.14Developer UtilitiesJSON FormatterValidate, format or minify JSON.15Developer UtilitiesCSV to JSONTurn tabular text into structured data.16Inspect & AnalyzeURL ParserBreak any URL into useful parts.17Inspect & AnalyzeFile Hash CheckerVerify a file without uploading it.18File & Image ToolsImage Metadata CleanerExport a cleaner, share-ready image.19File & Image ToolsFile Size ConverterCompare decimal and binary units.20Developer UtilitiesTimestamp ConverterMove between Unix time and dates.21GeneratorsUUID GeneratorGenerate collision-resistant IDs.22Privacy ToolsTOTP GeneratorCreate time-based one-time codes locally.23Developer UtilitiesColor ContrastCheck WCAG contrast with live preview.24Developer UtilitiesCSS GradientDesign a gradient and copy the CSS.06GeneratorsColor Palette GeneratorCreate a balanced five-color palette locally.26Developer UtilitiesRegex TesterTest patterns with clear match highlights.27Developer UtilitiesText Diff CheckerCompare two versions line by line.28Privacy ToolsText EncryptorEncrypt and decrypt short messages locally with AES-GCM.29File & Image ToolsFile EncryptorProtect local files with password-derived AES-GCM encryption.30GeneratorsQR Code GeneratorCreate a downloadable QR code from text or a URL.31File & Image ToolsQR Image ReaderRead a QR code from an image on your device.32Inspect & AnalyzeIP Subnet CalculatorCalculate IPv4 and IPv6 network ranges from CIDR.33Inspect & AnalyzeSecurity Headers CheckerReview pasted HTTP response headers against common protections.34Developer UtilitiesCSP BuilderBuild a Content Security Policy and flag risky directives.35Developer UtilitiesJSON Schema ValidatorValidate a JSON document against a local JSON Schema.36Encode & DecodeYAML JSON ConverterConvert YAML and JSON locally with a safe data schema.37Developer UtilitiesSQL FormatterFormat SQL with selectable dialects and indentation.38Developer UtilitiesMarkdown PreviewRender a safe Markdown preview without raw HTML.39File & Image ToolsFile Signature CheckerCompare a file extension with its detected byte signature.40Developer UtilitiesText CleanupNormalize, sort, deduplicate and change text case.
NO MATCHESNo tools found.
Try a different name or category.
COMMON TASKS / 03
Choose by task.
Before using a token or URLInspect the host and readable claims; decoding does not verify a signature.
Before sharing a fileCompare file signatures or clean image metadata from a sharing copy.
LOCAL BY DEFAULT / 04
Useful work stays in your tab.
SafeStack tools are designed for small, focused tasks. Your inputs stay in the browser while you work, so you can inspect each result before using it elsewhere.
01
Private by designTool inputs are processed in your browser tab.
02
Clear about limitsEach utility explains what it can and cannot prove.
03
Ready when neededNo account is required to use the toolkit.
YOUR BROWSERNO UPLOAD ↗
FIELD NOTES / 05
Understand the small decisions.
FIELD NOTE6 min read
Password security basics
Build a practical routine for unique credentials, recovery and safer account access.
Read article ↗FIELD NOTE5 min read
How browser encryption works
Separate HTTPS, local processing and actual encryption with a browser-based example.
Read article ↗FIELD NOTE5 min read
How to create a strong passphrase
Choose random words, understand the estimate and store the result safely.
Read article ↗