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TOOL TOPIC

File, storage & transfer

Browser tools for filenames, hashes, duplicates, file signatures, storage totals, and upload/download/transfer estimates.

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Common tasks in this topic

Tools for estimating upload, download, network transfer, disk copy, migration time, and storage-unit conversions.

1
Estimate upload and download time from link speed
2
Include latency in transfer-time estimates
3
Convert KB, MB, GB, and related storage units

Tools in this topic

Choose the tool that most closely matches the task you need to finish.

File transfer time calculator with latencyEstimate file transfer time from file size, throughput, latency and an estimated number of round trips.Open  →Upload time calculatorEstimate upload duration from file size and upstream speed.Open  →Download Time CalculatorEnter file size and download speed to see how long the download will take.Open  →Disk copy time calculatorEstimate local file copy time from data size and effective transfer speed in MB/s.Open  →Data migration time calculatorEstimate migration duration from data volume, throughput and an effective utilization percentage.Open  →File Transfer Time CalculatorEnter file size and transfer speed to estimate how long the transfer will take.Open  →Storage unit converterConvert decimal and binary storage units.Open  →File SHA hash checkerCalculate SHA-1, SHA-256, SHA-384, or SHA-512 hashes locally for a file.Open  →File checksum verifierHash a file locally and compare it with an expected checksum.Open  →Batch file renamerPreview batch renames with prefix, suffix, numbering, and search/replace.Open  →Filename sanitizerSanitize filenames by removing problematic characters and trailing dots/spaces.Open  →Multiple file size calculatorCalculate total, average, largest, and smallest sizes for selected files.Open  →File list exporterExport selected file names, sizes, types, and modified dates as CSV or JSON.Open  →Duplicate file detectorDetect byte-identical duplicate files by grouping SHA-256 hashes.Open  →File type inspectorInspect common magic bytes and compare detected type with extension and MIME.Open  →Folder structure viewerExport a selected folder structure as text, Markdown, or JSON.Open  →Folder compare toolCompare two folders by relative path, size, and modified time and export differences.Open  →File extension summarySummarize file counts and total size by extension in a selected folder.Open  →File size distribution analyzerAnalyze file-size buckets and list the largest files in a folder.Open  →File last-modified analyzerAnalyze last-modified dates, age buckets, oldest and newest files.Open  →Bandwidth requirement calculatorCalculate required Mbps and MB/s from data size and target completion time.Open  →Chunk upload plannerPlan chunked uploads from file size, chunk size, bandwidth, and parallelism.Open  →Checksum manifest generatorGenerate a SHA checksum manifest for multiple files or a folder.Open  →

Related guides

Use these when you need the decision context around the tools.

Mbps vs MB/s: why transfer-time estimates can be off by 8×Review decisions, failure points and workflow context.Read →

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Office & data workChoose related tools from a practical workflow.Open →Web developmentChoose related tools from a practical workflow.Open →

Related references

Keep the relevant formats and units close while you work.

Digital storage unitsOpen the related reference guideOpen  →SI prefixes & unitsOpen the related reference guideOpen  →