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Free Online Developer, Encoding & Security Tools

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Base64 EncoderEncode text, JSON, URLs or files to Base64, standard or URL-safe.URL EncoderPercent-encode URLs or single query components.Base64 DecoderDecode Base64 (standard or URL-safe) back to text or bytes.SHA-256 Hash GeneratorCompute the SHA-256 digest — the standard for modern integrity checks.AES EncryptPassword-based AES-GCM/CBC encryption using the Web Crypto API.JSON Formatter & BeautifierPretty-print JSON with configurable indentation.CSV to JSON ConverterTurn CSV (or any delimited file) into a JSON array.Cron Expression ParserExplain cron syntax and compute the next 10 run times.DNS LookupQuery A, AAAA, MX, TXT, NS, CNAME and SOA records over DNS-over-HTTPS.IPv4 Subnet / CIDR CalculatorNetwork address, broadcast, wildcard, mask and host range from any CIDR.Unix Timestamp ConverterConvert Unix time to human dates and back, in any timezone.Number Base ConverterConvert integers between bases 2–36.

Uitgelicht

Base64 EncoderEncode text, JSON, URLs or files to Base64, standard or URL-safe.JSON Formatter & BeautifierPretty-print JSON with configurable indentation.DNS LookupQuery A, AAAA, MX, TXT, NS, CNAME and SOA records over DNS-over-HTTPS.Unix Timestamp ConverterConvert Unix time to human dates and back, in any timezone.Regex TesterLive JavaScript regex testing with match groups highlighted.Strong Password GeneratorCrypto-random passwords with full policy control.JWT DecoderInspect JWT header, payload and signature metadata.UUID GeneratorRandom RFC 4122 v4 UUIDs, bulk generation included.

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Percentile CalculatorCompute any percentile of a data set with linear interpolation, plus all deciles.Statistics CalculatorMean, median, mode, range, variance, standard deviation, standard error, quartiles and IQR from a list of numbers.Volume ConverterConvert litres, millilitres, US and imperial gallons, cups, pints, quarts and fluid ounces.Temperature ConverterConvert Celsius, Fahrenheit, Kelvin and Rankine with the formulas shown.Weight ConverterConvert kilograms, grams, tonnes, pounds, ounces, stones and carats.Length ConverterConvert metres, kilometres, centimetres, inches, feet, yards, miles and nautical miles.Favicon GeneratorRender text or color into a real .ico file locally.Email Address ObfuscatorEncode emails to defeat scrapers.JSON-LD Structured Data GeneratorCreate schema.org JSON-LD for articles, products and FAQs..htaccess Redirect Generator301/302 redirect and HTTPS-force snippets.robots.txt GeneratorCompose a correct robots.txt with sitemaps and rules.HTML Meta Tag GeneratorBuild title, description, OG and Twitter card tags.

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Decode Base64 To String — Free Online Tool | Base64 Decoder 26173Tools Sha256 Hash Online — Free Online Tool | SHA-256 Hash Generator 26173Tools Generate Uuid Online — Free Online Tool | UUID Generator 26173Tools Convert Text To Uppercase — Free Online Tool | Case Converter 26173Tools Base64 Encode String — Free Online Tool | Base64 Encoder 26173Tools Format Json Online— Free Online Tool | JSON Formatter & Beautifier 26173Tools Url Encode Query String— Free Online Tool | URL Encoder 26173Tools Convert Unix Timestamp— Free Online Tool | Unix Timestamp Converter 26173Tools

Gidsen

JWT Anatomy: Header, Payload, Signature — and Why Decoding Is Not Verifying CIDR and Subnet Masks Explained with Worked Examples JSON vs YAML vs TOML: Configuration Formats Compared URL Encoding Rules: Reserved Characters and Percent-Encoding UUIDs Explained: v4 vs v7 vs ULID for Database Keys MD5 vs SHA-1 vs SHA-256: Choosing a Hash Function

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