Nothing is uploaded
Your file is read into memory by the browser and processed there. No copy exists on any server, so confidential material stays confidential.
Developer tools
Developer tools cover the throwaway tasks that interrupt a build: pretty-printing a minified JSON payload, decoding a Base64 blob from a log line, hashing a string to compare checksums, or generating identifiers for a fixture file. They are deliberately single-purpose and load in well under a second.
JSON Formatter & Validator
Pretty-print, minify and validate JSON with precise error positions.
Base64 Encoder & Decoder
Convert text to Base64 and back, with UTF-8 handled correctly.
URL Encoder & Decoder
Percent-encode query values or decode an escaped URL.
UUID Generator
Generate cryptographically random version 4 UUIDs in bulk.
Hash Generator
Compute SHA-1, SHA-256, SHA-384 and SHA-512 digests of any text.
CSV to JSON Converter
Convert delimited spreadsheet data into an array of JSON objects.
How these tools work
No account, no cap
There is no sign-up wall, no daily quota and no watermark. Open the page and work.
Installable and offline
Add Toolspea to your home screen and the tools you have opened keep working without a connection.
Developer tools — frequently asked questions
Related guides and categories
Where to go next if this category is not quite what you need.
SEO toolsCategory4 browser-based seo tools that never upload your files.Text toolsCategory5 browser-based text tools that never upload your files.What is Base64 encoding, and when should you actually use it?GuideBase64 turns binary into safe ASCII text. Here is how it works, why it is not encryption, and the three cases where it is the right tool.Converting CSV to JSON without breaking your dataGuideDelimiters, quoted fields, leading zeros and encoding — the four things that quietly corrupt a spreadsheet conversion.Why browser-based tools are safer than upload-based onesGuideWhat actually happens to a file you upload, and how client-side processing changes the risk for confidential material.All Toolspea toolsPageSearch the full directory of 31 free browser tools.Getting startedFAQHow Toolspea works, what you need before you begin, and what happens the first time you open a tool.
Explore other categories
Text tools5 toolsSEO tools4 toolsImage tools3 toolsCalculators3 toolsPDF tools6 toolsFile tools3 toolsGenerators0 toolsOther tools1 tools
Looking for something specific? Search the full directory or read the FAQ centre.