diff --git a/src/cmd/jsondebug/common/helpers.go b/src/cmd/jsondebug/common/helpers.go
index 6b2a6e29b..2eeff9dcc 100644
--- a/src/cmd/jsondebug/common/helpers.go
+++ b/src/cmd/jsondebug/common/helpers.go
@@ -3,7 +3,6 @@ package common
 import (
 	"encoding/json"
 	"fmt"
-	"math/rand"
 	"runtime"
 	"time"
 )
diff --git a/src/cmd/jsondebug/manifestgen/gen.go b/src/cmd/jsondebug/manifestgen/gen.go
new file mode 100644
index 000000000..8802fa767
--- /dev/null
+++ b/src/cmd/jsondebug/manifestgen/gen.go
@@ -0,0 +1,177 @@
+package main
+
+import (
+	"compress/gzip"
+	"encoding/json"
+	"fmt"
+	"math/rand"
+	"os"
+	"time"
+
+	"github.com/pkg/errors"
+	"golang.org/x/exp/maps"
+
+	"github.com/alcionai/corso/src/cmd/jsondebug/common"
+)
+
+const (
+	hostName = "host-name"
+	userName = "user-name"
+)
+
+func generateManifestEntry() (*common.ManifestEntry, error) {
+	snapMan := generateSnapManifest()
+
+	// Base tag set for all snapshots.
+	tags := map[string]string{
+		"type":     "snapshot",
+		"hostname": snapMan.Source.Host,
+		"username": snapMan.Source.UserName,
+		"path":     snapMan.Source.Path,
+	}
+
+	maps.Copy(tags, snapMan.Tags)
+
+	serializedSnapMan, err := json.Marshal(snapMan)
+	if err != nil {
+		return nil, errors.Wrap(err, "serializing inner struct")
+	}
+
+	res := &common.ManifestEntry{
+		ID:      randStringLen(32),
+		ModTime: time.Now(),
+		Deleted: rand.Uint32()&1 != 0,
+		Labels:  tags,
+		Content: serializedSnapMan,
+	}
+
+	return res, nil
+}
+
+func generateSnapManifest() common.SnapManifest {
+	var incomplete string
+
+	// Roughly 1/4 incomplete.
+	if rand.Intn(100) < 25 {
+		incomplete = "checkpoint"
+	}
+
+	path := randString()
+
+	res := common.SnapManifest{
+		Source: common.SourceInfo{
+			Host:     hostName,
+			UserName: userName,
+			Path:     path,
+		},
+		StartTime: rand.Int63(),
+		EndTime:   rand.Int63(),
+		Stats: common.StatsS{
+			TotalFileSize:         rand.Int63(),
+			ExcludedTotalFileSize: int64(rand.Uint32()),
+			TotalFileCount:        rand.Int31(),
+			CachedFiles:           rand.Int31(),
+			NonCachedFiles:        rand.Int31(),
+			TotalDirectoryCount:   rand.Int31(),
+			ExcludedFileCount:     rand.Int31(),
+			ExcludedDirCount:      rand.Int31(),
+			IgnoredErrorCount:     rand.Int31(),
+			ErrorCount:            rand.Int31(),
+		},
+		IncompleteReason: incomplete,
+		RootEntry: &common.DirEntry{
+			Name:        path,
+			EntryType:   randStringLen(1),
+			Permissions: rand.Intn(512),
+			FileSize:    rand.Int63(),
+			ModTime:     rand.Int63(),
+			UserID:      rand.Int31(),
+			GroupID:     rand.Int31(),
+			ObjectID:    randStringLen(32),
+			DirSummary: &common.DirectorySummary{
+				TotalFileSize:     rand.Int63(),
+				TotalFileCount:    rand.Int63(),
+				TotalSymlinkCount: rand.Int63(),
+				TotalDirCount:     rand.Int63(),
+				MaxModTime:        rand.Int63(),
+				IncompleteReason:  incomplete,
+				FatalErrorCount:   rand.Int(),
+				IgnoredErrorCount: rand.Int(),
+			},
+		},
+		Tags: map[string]string{
+			// User stand-in.
+			"tag:" + randStringLen(40): "0",
+			"tag:backup-id":            randStringLen(36),
+			"tag:is-canon-backup":      "0",
+			// Service/data type stand-in.
+			"tag:" + randStringLen(20): "0",
+		},
+	}
+
+	return res
+}
+
+var charSet = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ123456789")
+
+func randString() string {
+	// String lengths between [10, 128] bytes.
+	return randStringLen(rand.Intn(119) + 10)
+}
+
+func randStringLen(length int) string {
+	res := make([]rune, length)
+
+	for i := range res {
+		res[i] = charSet[rand.Intn(len(charSet))]
+	}
+
+	return string(res)
+}
+
+func main() {
+	data := &common.Manifest{
+		Entries: make([]*common.ManifestEntry, 0, common.NumItems),
+	}
+
+	for i := 0; i < common.NumItems; i++ {
+		entry, err := generateManifestEntry()
+		if err != nil {
+			fmt.Printf("Error generating random entry: %v\n", err)
+			return
+		}
+
+		data.Entries = append(data.Entries, entry)
+	}
+
+	f, err := os.Create(common.FileName)
+	if err != nil {
+		fmt.Printf("Error making regular output file: %v\n", err)
+		return
+	}
+
+	defer f.Close()
+
+	enc := json.NewEncoder(f)
+	if err := enc.Encode(data); err != nil {
+		fmt.Printf("Error writing json to regular file: %v\n", err)
+		return
+	}
+
+	fgz, err := os.Create(common.FileName + common.GzipSuffix)
+	if err != nil {
+		fmt.Printf("Error making gzip output file: %v\n", err)
+		return
+	}
+
+	defer fgz.Close()
+
+	gz := gzip.NewWriter(fgz)
+	defer gz.Close()
+
+	enc = json.NewEncoder(gz)
+	if err := enc.Encode(data); err != nil {
+		fmt.Printf("Error writing json to regular file: %v\n", err)
+		return
+	}
+}