OpenFileTools
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Published tools

OpenFileTools

Browse browser-local PDF, image, media, file and developer workflows plus source-backed Trade Studio tools. Retired experiments are not kept public just to increase page count.

Showing 28 of 232 published tools.

Developer & Data

Format, encode, hash, inspect, and transform structured CSV or developer text locally.

JSON FormatterFormat, validate, or minify JSON with native parser semantics and no server processing.Base64 Encoder/DecoderDecode Base64 to text through nested Base64/Base64URL, GZIP, zlib, UTF-8, and UTF-16 layers, or encode text locally.URL Encoder/DecoderPercent-encode or decode complete URIs and individual URI components without opening any URL.Hash GeneratorGenerate and compare SHA-256, SHA-384, or SHA-512 file checksums locally to verify downloaded bytes against an expected digest.JWT DecoderDecode a three-part JWT header and payload locally without verifying or trusting its signature or claims.Regex TesterTest ECMAScript regular expressions, flags, captures, and match ranges in a timeout-protected local worker.XML FormatterValidate and conservatively format XML without resolving external entities or changing mixed-content whitespace.YAML FormatterValidate and format YAML 1.2 locally with comment-aware parsing, alias limits, and no custom code execution.JSON Schema ValidatorValidate JSON instances against a supplied JSON Schema draft 7 with local references and detailed error paths.Diff CheckerCompare bounded text by lines or words, or compare consistently formatted JSON without sorting object keys.Cron GeneratorBuild and validate standard five-field Unix cron expressions and preview the next five execution times.Timestamp ConverterConvert explicit Unix seconds or milliseconds to ISO, UTC, and local dates, or convert dates back to timestamps.Word & Character CounterCount Unicode graphemes, UTF-16 code units, words, lines, paragraphs, spaces, and UTF-8 bytes locally.Text Case ConverterConvert bounded text to common programming, prose, constant, and slug cases without changing the original.HTML Entity Encoder/DecoderEncode critical HTML characters or decode named and numeric entities as inert text without rendering markup.SQL FormatterFormat SQL locally for supported dialects with keyword casing and indentation controls; queries are never executed.HTML to MarkdownConvert inert pasted HTML into editable Markdown while removing executable and embedded elements locally.CSV ViewerOpen a CSV file or pasted CSV as a bounded, inert table with delimiter and header controls.CSV to JSONConvert bounded CSV into an array of objects or arrays and download reviewed JSON locally.JSON to CSVConvert arrays of flat objects or arrays into correctly quoted CSV without uploads.CSV CleanerApply selected structural cleanup operations to CSV and download a reviewed result without changing data types.CSV Column ExtractorSelect CSV columns in source order and download a new CSV without modifying cell values.CSV Row FilterFilter CSV rows by one selected column and a constrained text condition, then download the result.CSV to ExcelConvert CSV rows into a valid XLSX workbook with editable cells while preserving every value as text by default.JSON to TypeScriptGenerate deterministic nested TypeScript declarations from a JSON object or array of objects.URL ParserParse an absolute URL into protocol, origin, hostname, port, path, query parameters, and fragment without visiting it.JSON ↔ YAMLConvert JSON and safe YAML structures in either direction while preserving scalars, arrays, objects, null, and Unicode.JSON ↔ XMLConvert JSON and XML using a documented deterministic element, array, attribute, text, and null mapping.